SNAKEBITE IN THE U.S.
VENOMOUS SNAKES
Approximately 120 species of snakes inhabit the U.S., with only 21 species being venomous.1 Many venomous snake species are small, produce low potency venom, or have such an insular or restricted range that animal bite exposure is unlikely. The more important species involved in animal envenomation are listed in Table 1. Distribution of these species is illustrated in figures accompanying a description of the snake. Snakes are not spread in a uniform distribution pattern throughout their range. Suitable habitat, availability of adequate prey, and freedom from encroachment by human activities influence where snakes are found. Two species of coral snakes (Elapidae) are native to the U.S. (Table I, Figure 1 ), but they pose little risk to animals because of their small size and secretive behavior. The major dangerous species are pit vipers (Crotalidae),
DANGEROUS SPECIES
The eastern diamondback rattlesnake (Crotalus adamanteus) is the largest crotalid in the U.S., with some specimens reaching a length of 213 em (7ft), (Figures 2 and 3).2 Diamondback venom is not highly toxic (1.54 to 2.4 mg/kg, mouse i.v.); but because of the snake's aggressive behavior and large potential injection dose (up to 683 mg dry weight), a bite in a small animal may be fatal. Most of the cases of severe envenomation of animals within its range are caused by the eastern diamondback. The western diamondback rattlesnake (Crotalus atrox) is only slightly smaller than its eastern cousin (Figures 3 and 4). It also has a pugnacious disposition and produces approximately the same amount of venom with a similar toxicity. 2 The Mojave (green) rattlesnake, Crotalus scutulatus (Figure 5), is a small snake [maximum length approximately 123 em (4ft)] that inhabits deserts and mountains from southern California and Arizona into central Mexico (Figure 6). Venom yield varies from 8 to 139 mg dry weight, but the toxicity of Mojave rattlesnake venom (0.14 to 0.21 mg/kg) makes this species the most dangerous snake crotalid in the U.S.2 Together, the nine subspecies of Crotalus viridis inhabit most of the western U.S. (Table 1 and Figures 7 and 8). Subspecies vary in maximum length from 70 em (2ft) to 175 em (5.75 ft). Venom yield in larger snakes may reach 200 mg dry weight, with a toxicity of 1.0 to 3.0 mg/kg. Large snakes may produce moderate to severe envenomation in animals. The timber rattlesnake, Crotalus horridus horridus (Figure 9), and the canebrake rattlesnake, C. horridus atricaudatus, are both large snakes [maximum is estimated that 45,000 people are bitten annually by snakes in the U.S.; of these, approximately 7000 are treated by a physician for envenomation. 1 Statistics for the prevalence of snakebite in animals are unavailable, but it is reasonable to assume that snakebite in animals is more common than in humans. Most incidents of animal snakebite go undetected and untreated. Snakebite occurs in every state except Alaska and Hawaii. Venomous snakes may be active year round in the southern tier of states; but in the northern temperate regions, activity is restricted to late spring, summer, and early fall. Inasmuch as snakes are ectothermic, feeding and resting patterns are determined by ambient temperature. In desert regions, snakes tend to be nocturnal to avoid lethal daytime temperatures. The prairie rattlesnake, Crotalus viridis viridis, inhabits regions from southern Saskatchewan in Canada to northern Chihuahua in Mexico. Its activity patterns vary with the region. Dogs may be bitten when coursing through fields and woods, especially in tall vegetation. If an inquisitive dog sees a snake, it may move within striking distance to investigate. Young, inexperienced dogs are most likely to approach too closely. Rattlesnakes may not rattle before striking. Yard-confined pets have been bitten by snakes returning to newly established residential areas that were previously snake habitat.
Aggressive dogs may attack a snake and be bitten, as it is not possible for a dog to jump away from a rattlesnake strike. Even the legendary mongoose is incapable of successfully attacking a crotalid. A mongoose may kill a cobra because of the cobra's striking behavior, see page 115, Chapter 13, but a crotalid strike is much too fast to dodge. It is estimated that several hundred horses are bitten each year.3.4 Horses may be bitten on the head or neck while grazing in tall grass. Limb bites occur while walking in tall vegetation or along trails in the wilderness. Inquisitive foals and yearlings frequently experience bites on the nose . Occasionally, a horse may accidentally step on a resting crotalid, but given any kind of warning, the snake tends to move away. Llamas and alpacas are naturally inquisitive and even adults may approach strange animals in their environment. Venomous snakes are essentially nonexistent in the native habitats of South American camelids; thus, there has been no evolutionary selective pressure to avoid snakes. Nose and face bites are the most common. Crotalid snakes and non-prey sympatric wild animal species generally coexist without harm, but accidental encounters resulting in bites must surely occur. Captive wild animals have been bitten when snakes entered their enclosures. Crotalid venoms tend to be more complex than those of elapid snakes. 2 Rattlesnake venoms contain a high percentage of non-neurotoxic proteins (90% of the dry weight of rattlesnake venom is protein),5 with proteolytic enzymes, hemorrhagic toxins, and myotoxins predominating. Neurotoxins predominate in coral snake venom. Two new neurotoxins (crotoxin and Mojave toxin) have been isolated from the neotropical rattlesnake, Crotalus durissus, and the Mojave rattlesnake. The venoms of these snakes produce syndromes (described later) differing from the syndrome of typical crotalid envenomation. It is of interest to note that the concentration of Mojave toxin isolated from venom of the Mojave rattlesnake varies markedly from north to south within the snake's distributional range. Snakes in the southern aspects of the range (Mexico) have a much more potent venom.5
SIGNS OF ENVENOMATION
A. CROTALID SNAKES
All pit vipers are venomous, but smaller species or those that produce less potent venom may cause minimal clinical signs. Envenomation may be classified as mild, with swelling, pain, and erythema occurring only at the bite site within an hour of the bite; moderate, if swelling progresses beyond the bite site and there is pain, local hemorrhage, and, possibly, subsequent tissue necrosis; or severe, if systemic manifestations develop. All degrees of envenomation occur from crotalid bites, depending on the injected dose of venom (size of snake, single or multiple bites, and aggressiveness of snake), potency of the venom, type of bite inflicted (single or double fang, scratch, or subcutaneous or deep injection), and the species of animal bitten. The larger the snake and the smaller the victim, the more the likelihood of severe envenomation.
l. Human Crotalid Envenomation 1•6•7
Usually, one or two fang marks are evident, with a distance between fang marks of 0.5 to 4.0 em. Swelling may enhance the distance and subsequent estimation of the size of the snake. Most victims experience a burning pain sensation immediately following the bite, followed within a few minutes by swelling (pitting edema) that progresses to involve an entire limb within 6 to 8 h. Discoloration from subcutaneous hemorrhage appears initially at the bite site, and may progress proximally up the limb. If severe envenomation is untreated, or if treatment is delayed, marked edema with bullae formation or hemorrhagic blebs will develop in 6 to 36 h. Neurologic signs are minimal in most crotalid bites; but if paresthesia of the scalp, face, and lips or a metallic taste in the mouth occur, severe envenomation is indicated. 1 Other signs of envenomation include weakness, faintness, nausea, and vomiting. Crotalid venom contains a hemotoxin that damages endothelium, allowing hemorrhage to occur both externally and internally at any body site (epistaxis, melena, hematuria, cutaneous petechiae, and ecchymoses).' The ultimate effects of severe, untreated envenomation are hypovolemic shock, pulmonary edema, and renal failure. Human envenomation by the Mojave (green) rattlesnake produces a different syndrome. Little or no immediate pain or swelling may be associated with the bite; but within a few hours, signs of neural dysfunction appear, including diplopia, hoarseness, inability to swallow, and dyspnea associated with progressive respiratory paralysis. 1 Russell6 felt that neural dysfunction may be a reflection of cerebral hypoxemia associated with severe anemia. However, more recently, a neurotoxin (Mojave toxin) has been identified in Mojave rattlesnake venom.5 Terminal convulsions may result from the effects of Mojave toxin or simply reflect agonal struggling.6 This snake accounts for the majority of fatal human snakebites in California. The syndrome associated with this snakebite has not been reported in animals, but probably occurs in dogs under the same circumstances as for human bites. Bites of humans from other pit vipers (water moccasin, copperhead, pygmy rattlesnake, and massasauga) usually fit into the mild to moderate crotalid envenomation category.
2. Dog Crotalid Envenomation 9?14
Snakebite of a dog is seldom witnessed; therefore, signs have usually progressed to those of moderate envenomation before the animal is seen by a veterinarian. Schaer9 described the collective syndrome in a study of a series of eastern diamondback rattlesnake bites in dogs. Dogs were usually depressed and tachypneic upon presentation. Blood was frequently oozing from fang marks on the face, limbs, or body. Significant edema of the head (Figure 14) or limbs and hemorrhage were consistent findings (epistaxis, gingival and labial petechia and ecchymoses, and subcutaneous petechia on the ventral abdomen). Additional signs of moderate envenomation included sinus tachycardia, laryngeal edema, and chemosis. 10 •11 Systemic signs of severe envenomation also included shock, ventricular premature contractions, anuria, hemolysis, ventricular fibrillation, hemorrhagic diathesis (prolonged clotting time and disseminated intravascular coagulation), periorbital cellulitis, panophthalmitis, fibrinolysis, tissue necrosis and sloughing, (Figure 15), and, ultimately, death. All dogs that died had hemorrhagic diathesis or hemolysis. Mansfield11 reported similar signs in a series of snake envenomation in dogs, but also observed vomition, diarrhea, hypotension, anorexia, excessive salivation, tremors, coma, pulmonary edema, oliguria or anuria, paralysis, and convulsions.
3. Horse Crotalid Envenomation
In horses bitten on the nose, head, neck, or limb, pitting edema occurs at the bite site and progresses to include the entire head or limb. The author's experience has been with bites from the northern Pacific rattlesnake, Crotalus viridis oreganus, which is a relatively small snake that usually produces only mild to moderate envenomation. In bites of the nose or head, edematous swelling of the nose (Figures 16 and 17) and nasal mucosa may be accompanied by blood-tinged fluid oozing from one or both nostrils.3A The eyelids swell (chemosis) and excessive lacrimal secretions may be tinged with blood. The entire head, including the lips and ears, may become edematous. The pitting edema is not hot to the touch. progresses up the limb to include contiguous areas of the trunk (Figures 18 and 19). Tissue necrosis has been rare in the author's experience, but it has been reported in areas of the country where diamondback rattlesnakes are found. Dyspnea is a vital sign that must be monitored carefully. The horse is an obligate nasal breather because of an elongated soft palate. Swelling of the nostrils or nasal mucosa occludes the air passageways and may cause suffocation if not observed and treated. Pharyngeal swelling from a neck bite may obstruct air flow at that level. Death from snakebite is rare in horses unless there is hemorrhage into a vital organ or if head bites go untreated and the horse suffocates.
4. Llama Crotalid Envenomation
Signs of snakebite in llamas are similar to the syndrome observed in horses (Figures 20 and 21). 15 Llamas are also obligate nasal breathers and bites on the nose may be fatal within 2 h if a tracheostomy tube is not placed. No tissue necrosis or systemic signs have been observed with envenomation by northern Pacific rattlesnakes , but bites from large diamondback rattlesnakes may cause necrosis if envenomation is severe.
5. Sheep and Other Livestock
Clinical signs are usually restricted to localized swelling of the head (Figures 22 and 23) or limbs. 16?21
6. Wild Animals
Accidental envenomation of wild animals other than prey species must surely occur, but diagnosis is rarely made.22 Envenomation by the prairie rattlesnake occurred in eight captive Rocky Mountain elk, Cervus elaphus nelsoni, maintained in a herd in an enclosure in Colorado.23 Clinical signs included painful swelling (restricted to the face, muzzle, and submandibular space), inspiratory dyspnea, epistaxis, frothy, blood-tinged nasal discharge, epiphora, anorexia, and depression. Fang marks were observed in only two of the elk. One elk was bitten on two separate occasions. A privately owned ocelot (Felis pardalis) was bitten on a paw by a northern Pacific rattlesnake that wandered into its cage. Signs were minimal, including swelling, erythema, and pain that was restricted to the bite site
ELAPID (CORAL) SNAKES
1. Signs of Elapid Snakebite (Coral Snake) in Humans Coral snakes must grasp a segment of anatomy, usually a digit, that is small enough to be surrounded by the open mouth and grasped while chewing. Pain and swelling at the bite site are usually minimal. Signs of neural dysfunction may begin within 90 min or be delayed for several hours. Signs include numbness and weakness of the affected limb, apprehension, drowsiness to unconsciousness, muscle fasciculation, tremors of the tongue, dysphagia, increased salivation, nausea, and vomiting.6•8 Other signs reported include headache, photophobia, colic, miosis, dyspnea, convulsions, and paralysis. In fatal bites, death usually results from paralysis of the respiratory musculature or cardiac failure.
2. Coral Snake Envenomation in Pets Coral snakebite may occur in pets, but no descriptions of the clinical syndrome have been published. The dog has been used as an experimental subject for the study of coral snake venom. Signs reported from these studies indicate a syndrome similar to that of the human victim, with signs of muscular weakness, paresis, paralysis, dyspnea, dysphagia, muscle fasciculation, and cardiac failure.
DIAGNOSIS OF ENVENOMATION
A history of bite exposure is confirmatory, but seldom available. Season of the year, prevalence of venomous snakes, and experience with previous snakebite cases are heavily relied upon. Evaluation of clinical signs is paramount.
LABORATORY SUPPORT
The toxic effects of crotalid snake venoms produce changes that are reflected in hematologic and biochemical values. Laboratory determinations may be used for initial evaluation of the case as well as for monitoring progress of therapy. The following laboratory analyses should be conducted in moderate to severe envenomation cases. Common abnormalities are a reduction in erythrocyte numbers and hemoglobin concentration along with hypofibrinogenemia and thrombocytopenia. Clotting mechanisms are inhibited, resulting in prolonged prothrombin, thrombin, and clotting times. Serum enzyme levels may be elevated, with tissue necrosis. Excessive protein, glucose, and blood or hemoglobin are commonly observed in urine.
1. Serology
Recently, serologic tests (ELISA and immunodiffusion) have been used to identify snake venom antigens or antibodies.23 Blood or serum oozing from a fang mark have been tested. In countries where numerous species of snakes are found, it is important to identify the snake so that specific antivenin may be administered. This is not of great consequence in crotalid bites in the U.S.
2. Differential Diagnosis
Small Pets: head trauma (contusion or cranial fractures), migrating grass awns, insect bites, and foreign body penetration must be considered. Horse: snakebite is only one of several factors to consider in head swelling of a horse. Trauma and pharyngeal abscesses may obstruct venous drainage of the head. Purpura hemorrhagica (a toxic reaction to bacterial infection) produces similar swelling, but with considerable ecchymoses. Multiple stings from bees or wasps may also cause head swelling.
VI. TREATMENT OF CROTALID SNAKEBITE IN THE U.S.
For general management of crotalid snakebite in animals, refer to Chapter 14. Antivenin for crotalid bites in the U.S. is Wyeth's or Fort Dodge's Antivenin (crotalidae) polyvalent (Table 3 in Chapter 14). A. HUMAN
Treatment for human crotalid snakebite in the U.S. is described in Chapter
14.24-28
B. DOG9,11-14,29,30
Severely envenomated dogs should be observed frequently. Periodic evaluation of blood pressure and an electrocardiogram is important during the course of therapy. If hemorrhage is already present when the patient is first examined, blood should be collected for cross-matching, in anticipation of the necessity for blood transfusion. Cross-matching cannot be performed once antivenin therapy begins. 1 Administration of antivenin may be crucial to saving the life of a pet envenomated by a large eastern or western diamondback rattlesnake. The cost of therapy should be discussed with the client before administering antivenin because each vial costs from $130.00 to $150.00. The quantity of antivenin required for a dog is the same as for a human child or adult. The critical factor is the amount of venom injected that must be neutralized. Veterinarians practicing in areas inhabited by the diamondback rattlesnakes may administer five or more vials of antivenin. The effectiveness of corticosteroid therapy is controversial, but corticosteroids are not contraindicated. Broad-spectrum antibiotics should be administered. It is not necessary to administer tetanus antitoxin or toxoid, as dogs are quite resistant to tetanus. 11 Numerous other medications and forms of therapy for dogs have been reported in the literature (see Chapter 14). There are no reports of true anaphylactoid reactions to antivenin nor development of serum sickness in dogs.9 Dogs do develop allergic reactions such as erythema of the pinnae that is responsive to benadryl administration.*
HORSE
Patency of the respiratory tract is the primary concern. If the bite is witnessed and the snake identified as venomous, a short segment of garden hose may be placed in a nostril to maintain patency before swelling obstructs the nares.3.4 Such a tube may be sutured in place by a veterinarian. A more satisfactory method is placement of a tracheostomy tube, see page 132. Supplemental oxygen may be insufflated through a tracheostomy tube via a small tube from a tank of oxygen. Broad-spectrum antibiotics should be administered along with tetanus antitoxin, or toxoid if vaccination is current. Horses that become hyperexcited may be quieted with xylazine hydrochloride (0.2 to 0.4 mg/kg) or acepromazine maleate (0.03 to 0.08 mg/kg). As both of these drugs cause lowering of the blood pressure, it is important to monitor the heart for a few minutes after administration. Antivenin usage should be considered in envenomation of a foal or severe envenomation of an adult. However, economic factors may preclude this form of therapy.
LAMA/ALPACA
Placement of a nasal tube may also be considered as first aid in observed bites of the llama or alpaca, but the space is much more narrow than in the horse and a correspondingly smaller tube is required. The smaller tube may not provide sufficient air flow. Tracheostomy, intravenous fluids to maintain hy-through the nostrils in 48 to 72 h) have been the author's primary method of therapy. When the swelling begins to recede, periodically occlude the tracheostomy tube to determine if the animal can breathe through the nostrils. The value of these animals warrants a discussion with the owner on the merits of antivenin therapy. If the bite or signs are observed and the animal is taken to a veterinary clinic within 2 h of the bite, the administration of antivenin may obviate the need to perform tracheostomy. Later administration of antivenin may shorten the course of envenomation. The author found no mention in the literature of the effects of venom on a fetus of any animal. The epitheliochorial type of placentation of came lids may inhibit transfer of large-molecule toxins to the fetus, but this has not been determined experimentally. Surely, if severe hemolysis occurs from the effects of the venom, hypoxic death of the fetus may ensue. If a pregnant llama is bitten, antivenin therapy may minimize the possibility of fetal death caused by envenomation.
TREATMENT OF CORAL SNAKEBITE IN DOGS
Coral snakes tend to bite and hold on; thus, pets may be observed with the snake still attached. In such cases, the pet should be transported immediately to a veterinary hospital and antivenin therapy begun at once. If therapy is delayed several hours until systemic signs develop, antivenin may be unable to reverse the effects of the neurotoxic venom. A specific antivenin, Wyeth's Antivenin (Micrurus fulvius), is available for the eastern and Texas coral snakes, but, unfortunately, there is no protection against bites of the Sonoran coral snake, Micruroides euryxanthus. If dyspnea indicates respiratory paralysis, positive pressure respiratory assistance may be necessary for hours to days. Other supportive and symptomatic therapy should also be given.
Sunday, June 9, 2019
MOST DEADLY SNAKES AROUND THE WORLD
MOST DEADLY SNAKES AROUND THE WORLD
Every year, up to 125,000 people die from snakebites. However, the most venomous snakes are not always the most dangerous, because many of them live in remote places where there are few people. The biggest killers live in densely populated countries where people are very likely to step on them, get bitten, and not receive proper treatment.
Puff adder
This heavily built viper is the most dangerous snake in Africa. It gets its name from the way it puffs up its body and hisses in a threat display before striking with its very long fangs.
Australian taipan
The venom of this Australian snake is so toxic that its bites are deadly if not treated quickly. The closely related inland taipan, also found in Australia, is even more lethal. But both live in such remote regions that bites are rare.
Bushmaster
The South American bushmaster is the biggest of the pit vipers, growing to 10 ft (3 m) or more in length. Its venom can be fatal, but luckily bites are rare.
Gaboon viper
Similar to the puff adder, this central African ambush killer has huge fangs that can be up to 2 in (5 cm) long—longer than those of any other snake.
Fer-de-lance
This highly venomous pit viper is the most deadly snake in South America. Many of its victims are bitten while working in banana plantations
Desert death adder
Long fangs, big venom glands, and a very fast strike make this adder one of the deadliest snakes in Australia. However, since not many people live in its desert habitat, it claims very few victims.
Monocled cobra
Like all cobras, this South Asian snake tries to scare off its enemies with a threat display. But if that fails, it will bite, injecting a deadly venom.
Saw-scaled viper
Its habit of lying near where people live means that this small Asian viper is often stepped on. As a result, it bites and kills thousands of people each year.
Tiger snake
The tiger snakes of southern Australia and Tasmania live in coastal regions and wetlands. Their venom is as deadly as that of a cobra.
Eastern brown snake
Its extremely toxic venom makes this the most dangerous Australian snake, but most of its victims recover if they are treated with antivenom in time.
Snake venom is a nightmare cocktail of poisons that might have been cooked up by a mad scientist. It is basically saliva, laced with powerful digestive juices that break down the tissues of the snake’s prey. In the most venomous snakes, the mixture has been refined into a lethal weapon, used for both hunting and defense.
Types of venom
The toxins in snake venom work in different ways. Some attack the victim’s blood or muscles, while others paralyze its nervous system. Each type of snake has its own toxic recipe.
BOOMSLANG
Equipped with fangs in the rear of its mouth, this African tree snake has a powerful venom that stops its victim’s blood from clotting, so it bleeds to death.
RATTLESNAKE
A rattlesnake is a type of viper, with a hemotoxic venom that causes massive bleeding and destroys flesh. It slows the blood circulation, causing the symptoms of shock.
TAIPAN
The taipan has the most deadly venom of any land snake. It kills very quickly by attacking the nervous system and paralyzing the bite victim’s breathing.
SEA SNAKE
A sea snake needs extremely potent venom to stop its prey from escaping. It is myotoxic, paralyzing the victim’s muscles. Luckily, sea snakes rarely bite.
BLACK MAMBA
Strong enough to kill an elephant, black mamba venom attacks the nervous system and heart muscle with rapid, deadly effect.
INDIAN COBRA
Like most cobras, this one has a neurotoxic venom that spreads through the body and can kill by paralyzing the nerves that control breathing.
Scary fangs Venomous snakes inject their victims
using fangs—special teeth designed to puncture fl esh before channeling venom into the prey.
HOW FANGS WORK
When a rattlesnake is resting, its sharp fangs are folded back. When it gapes its mouth open, the fangs hinge forward, so the snake can use them to stab its victim. The muscles surrounding the venom glands then contract to squirt highly toxic venom through the fangs. The venom targets blood and internal organs, causing intense pain and vomiting.
BOOMSLANG
Most venomous snakes have long, hollow fangs that inject venom. But a “rear-fanged” snake like the boomslang has simpler ones near the back of its mouth that just bite into the victim, allowing toxic saliva to flow into the wounds.
RATTLESNAKE
Found in the United States, the eastern diamondback rattlesnake is the largest species of rattlesnake and has a highly venomous bite. When in danger, it shakes a rattle on the end of its tail to scare off predators.
PIT VIPER
Like all pit vipers, the two-striped forest pit viper has heat-detecting pits located in between its eyes and nostrils. It’s responsible for many of the recorded snake bites in the Amazon rainforest.
PUFF ADDER
Found in the rocky grasslands of Africa, this species of viper is usually active at night, when it ambushes unsuspecting prey.
BLACK MAMBA
This relative of the cobras has shorter fangs than a rattlesnake or viper, but they are just as effective. It’s probably the deadliest species on the planet.
VENOM
Scientists “milk” snakes for their venom, which is then injected into a sheep to collect antibodies created by the sheep’s immune system. These are used to create antivenoms to combat the effects of a snakebite. These usually work extremely well, provided the victim gets treated quickly enough.
Every year, up to 125,000 people die from snakebites. However, the most venomous snakes are not always the most dangerous, because many of them live in remote places where there are few people. The biggest killers live in densely populated countries where people are very likely to step on them, get bitten, and not receive proper treatment.
Puff adder
This heavily built viper is the most dangerous snake in Africa. It gets its name from the way it puffs up its body and hisses in a threat display before striking with its very long fangs.
Australian taipan
The venom of this Australian snake is so toxic that its bites are deadly if not treated quickly. The closely related inland taipan, also found in Australia, is even more lethal. But both live in such remote regions that bites are rare.
Bushmaster
The South American bushmaster is the biggest of the pit vipers, growing to 10 ft (3 m) or more in length. Its venom can be fatal, but luckily bites are rare.
Gaboon viper
Similar to the puff adder, this central African ambush killer has huge fangs that can be up to 2 in (5 cm) long—longer than those of any other snake.
Fer-de-lance
This highly venomous pit viper is the most deadly snake in South America. Many of its victims are bitten while working in banana plantations
Desert death adder
Long fangs, big venom glands, and a very fast strike make this adder one of the deadliest snakes in Australia. However, since not many people live in its desert habitat, it claims very few victims.
Monocled cobra
Like all cobras, this South Asian snake tries to scare off its enemies with a threat display. But if that fails, it will bite, injecting a deadly venom.
Saw-scaled viper
Its habit of lying near where people live means that this small Asian viper is often stepped on. As a result, it bites and kills thousands of people each year.
Tiger snake
The tiger snakes of southern Australia and Tasmania live in coastal regions and wetlands. Their venom is as deadly as that of a cobra.
Eastern brown snake
Its extremely toxic venom makes this the most dangerous Australian snake, but most of its victims recover if they are treated with antivenom in time.
Snake venom is a nightmare cocktail of poisons that might have been cooked up by a mad scientist. It is basically saliva, laced with powerful digestive juices that break down the tissues of the snake’s prey. In the most venomous snakes, the mixture has been refined into a lethal weapon, used for both hunting and defense.
Types of venom
The toxins in snake venom work in different ways. Some attack the victim’s blood or muscles, while others paralyze its nervous system. Each type of snake has its own toxic recipe.
BOOMSLANG
Equipped with fangs in the rear of its mouth, this African tree snake has a powerful venom that stops its victim’s blood from clotting, so it bleeds to death.
RATTLESNAKE
A rattlesnake is a type of viper, with a hemotoxic venom that causes massive bleeding and destroys flesh. It slows the blood circulation, causing the symptoms of shock.
TAIPAN
The taipan has the most deadly venom of any land snake. It kills very quickly by attacking the nervous system and paralyzing the bite victim’s breathing.
SEA SNAKE
A sea snake needs extremely potent venom to stop its prey from escaping. It is myotoxic, paralyzing the victim’s muscles. Luckily, sea snakes rarely bite.
BLACK MAMBA
Strong enough to kill an elephant, black mamba venom attacks the nervous system and heart muscle with rapid, deadly effect.
INDIAN COBRA
Like most cobras, this one has a neurotoxic venom that spreads through the body and can kill by paralyzing the nerves that control breathing.
Scary fangs Venomous snakes inject their victims
using fangs—special teeth designed to puncture fl esh before channeling venom into the prey.
HOW FANGS WORK
When a rattlesnake is resting, its sharp fangs are folded back. When it gapes its mouth open, the fangs hinge forward, so the snake can use them to stab its victim. The muscles surrounding the venom glands then contract to squirt highly toxic venom through the fangs. The venom targets blood and internal organs, causing intense pain and vomiting.
BOOMSLANG
Most venomous snakes have long, hollow fangs that inject venom. But a “rear-fanged” snake like the boomslang has simpler ones near the back of its mouth that just bite into the victim, allowing toxic saliva to flow into the wounds.
RATTLESNAKE
Found in the United States, the eastern diamondback rattlesnake is the largest species of rattlesnake and has a highly venomous bite. When in danger, it shakes a rattle on the end of its tail to scare off predators.
PIT VIPER
Like all pit vipers, the two-striped forest pit viper has heat-detecting pits located in between its eyes and nostrils. It’s responsible for many of the recorded snake bites in the Amazon rainforest.
PUFF ADDER
Found in the rocky grasslands of Africa, this species of viper is usually active at night, when it ambushes unsuspecting prey.
BLACK MAMBA
This relative of the cobras has shorter fangs than a rattlesnake or viper, but they are just as effective. It’s probably the deadliest species on the planet.
VENOM
Scientists “milk” snakes for their venom, which is then injected into a sheep to collect antibodies created by the sheep’s immune system. These are used to create antivenoms to combat the effects of a snakebite. These usually work extremely well, provided the victim gets treated quickly enough.
MOST DANGEROUS SEA CREATURES
MOST DANGEROUS SEA CREATURES
From aggressive fish with a mouthful of teeth, to the most venomous marine animal, here are 8 sea creatures you should watch out for!
8. Titan Triggerfish
There's a misconception when swimming in the ocean that it's "obvious" which creatures will attack you and which ones won't. Like the Titan Triggerfish. Take a look at it. What do you think? Looks like a pretty regular fish right? Exactly! Plus, if you do a little research on Triggerfish as a species, they're actually pretty friendly fish, but this one is in a league of its own, and not in a good way. The Titan Triggerfish are wired to be very territorial, and as such, they'll go to great lengths in order to protect what is theirs. So you have to be careful if they’re in a bad mood!! They can grow to about a foot in length, and use their teeth to attack anyone or anything that they think is an “intruder". And they can be quite vicious too, because their teeth are incredibly sharp, and their jaws can clamp down with a ton of force. They can be found in most of the Indo-Pacific and usually are shy around divers. But if its reproductive season and divers are lurking around their nests, all bets are off. They're so territorial and protective that they've been known to attack divers who come anywhere close to their homes. And experienced divers look out for these fish whenever they go close to their reefs because their bite can be toxic and cause paralysis. Good news is, they like to attack the colorful parts like fins, which helps reduce the risk of personal injury. However, some unlucky divers have been knocked out cold!
7. Flower Urchin
While some creatures might look like harmless plants, be careful because appearances can be deceiving!! The flower urchin looks like a nice little bouquet of flowers, and it is one of the most frequently encountered sea urchins. Which is not that great because these echinoderms know how to attack when the time is right! There are spines sticking out of their “flowers" which are anything but decorative. The flower urchin is the “World’s Most Venomous” sea urchin and if their venom gets into your body, you're in for a very rough ride. The venom is known to causes spasms in humans, and that's just the beginning. You can also get convulsions, suffer from drowning, go through shock, get paralyzed, and yes, you can also die. And it doesn't take much to get the venom in you, all it takes is the tiniest contact with your bare skin. Flower Urchins have caused many deaths over the years, and this has made them infamous among divers. Good news is that sea urchins are defensive creatures, they aren’t trying to hurt you on purpose so if you do get jabbed, it’s most likely your fault. Just trust me, and don't go near this thing. And now for number 6, but first can you name the most venomous marine animal? Let us know your answer in the comments below! The answer is coming up! And if you are new here, welcome, and be sure to subscribe so you don’t miss out on the latest videos!!
6. Eels
Eels are special creatures, and there are many different types of them living underneath the waters. And many you need to be careful of. Some just like to strike, but others, like the Electric Eel, like to just send a shock through your system. The Electric Eel is a creature that can well and truly charge itself up for an attack, and given that you're most likely underwater when you meet this creature, it means the attack is all the more potent. The cells within their bodies build up electrolytes, and when they build up about 6000 of them, they can release a 600-volt charge into an enemy. They also emit a low-level charge that they use like radar. Plus they can grow up to 8 feet long! Eels can be very hostile, and they have been known to attack humans at times. And 600 volts to a human can do some serious damage, not the least of which is stopping your heart flat. So if you see an eel, swim the other way! Just in case!
5. Barracuda
Barracuda are pretty recognizable fish. Not only does it get a bad rap because it killed Nemo’s family, but also because of it’s razor sharp teeth and long shiny body. Of all the different types of Barracuda, the Great Barracuda is the most impressive. After all, it has the name "Great" in it. This creature can be up to six feet long, which is pretty menacing on its own, but its trademark is its speed. It cuts through water like a bullet does through air. It'll race towards anything and either slam into it, or bite it with its teeth, which as you can see are numerous, and razor sharp! In reality barracudas are not the most dangerous creature you will encounter but they have a very bad reputation. There have been about 25 reported attacks in the last 100 years, so why are they so scary? Because they are dangerous by design! They are often accused of attacking humans, even when they're not provoked. They are attracted to shiny objects because it looks like the reflection of a fish belly. Always avoid wearing any jewelry while diving!! Some divers and snorkelers have been attacked around their head as the barracuda tries to get to the object. They'll strike at them like they stole something. They might also mistake white, pale skin for fish skin. They will often get into fights with people fishing with spears as they try to get to the kill. There are even reports of Barracudas jumping out of the ocean to attack people on boats. They’re not scared of anything! And they’re kind of mean.
4. Pufferfish
There are many fish in the oceans that scare people away, but for entirely different reasons. While an eel or a barracuda is a physical threat, a Pufferfish is a threat inside and out. On the outside, the Puffer Fish has plenty of spines, and if threatened, such as when a human approaches it, it'll fill itself with water and even air, to make it look much larger than before. It’s more of a death sentence if you try to swallow it, but actually I think it’s kind of cute. Then, there's what's on the inside. Mainly, poison, lots of it. While many creatures have poison in them, it's usually located to a central area, like how snakes have venom in their fangs and can have them milked without harming the meat inside. For Pufferfish though, some species have poison all over their entire bodies. Tetrodotoxin to be exact which is 1200 times more poisonous than cyanide. There is enough toxin in one pufferfish to kill 30 adult humans. And there is no known antidote. Selling Pufferfish meat is outlawed in most countries, for our own good. Why? Well, it's because though you can get rid of poison in meat, the Pufferfish has it so completely intertwined with its being that if you fail in any way to get the poison all out, you will die. Currently, the only places that serve Puffer Fish are Japan, China, and Korea. Known as fugu, it is only prepared by licensed chefs who are specifically trained to handle Pufferfish. Even so, there are several deaths annually.
3. Stingray
The Stingray is one creature that everyone should fear and respect. While their attacks are rare, they do happen, and like some other creatures on this list, they’re not afraid of attacking when they feel provoked. The most famous case of a Stingray attack was the strike and killing of beloved zookeeper and animal conservationist Steve Irwin, aka the Crocodile Hunter. Irwin was underwater doing some filming for a show that was going to be called "Ocean's Deadliest", he was also going to film some footage for his daughter Bindi, who had a show herself. Irwin was famous for his ability to read a situation and interact with animals, and according to his crew, he gave the Stingray in question plenty of room. Irwin was just trying to get a shot of the Stingray swimming away from the camera. However, as he did so, the Stingray became defensive, and started flailing its tail around, and when it did, one strike caught Irwin in the heart. He quickly pulled it out, which was maybe the worst thing he could do. Despite the quick actions of his crew, Irwin passed away. It was very much a freak accident because you can be struck by a stingray barb and survive. But the barb slipped in between Irwin's rib cage. It’s hard to survive a direct hit to the heart. Rays also have venom in their barbs, which is not necessarily fatal, but it hurts a lot. It has enzymes and seratonin which make your muscles severly contract. Heat breaks down the venom and can limit the amount of damage. But if you are stung by an internal organ, your chances of survival will plummet.
2. Sharks
You don’t need me to tell you about sharks! While you can argue that sharks have always been feared, it was "Jaws" that helped bring the hysteria of sharks attacking humans to life. Which is actually kind of ironic, as most shark species DON'T attack humans, even when provoked. Shark attacks are actually pretty low when you look at statistics from around the world. But still, just because they don't attack a lot, doesn't mean they don't attack at all. And when they do attack, it makes worldwide news. Once one attack happens, everyone seems to freak out! Others get scared of the water, and I’m sure you’ve likely heard of one shark bite story or another. So the question is, what shark species attack humans the most? Well, that would be Great White Sharks, Tiger Sharks, and Bull Sharks. But that doesn't mean that's the order of most attacks animal. Great White Sharks are the most infamous sharks on the planet, thanks to Jaws, but the Tiger and Bull are just as fearsome, and arguably more aggressive than their Great White brethren. In fact, more people are killed by dogs than by Great White Sharks every year. Still though, these sharks are known to attack people, whether it be for territory, for food, or just basic animal instinct. As always though, we are way more of a threat to them, then they are to us.
1. Box Jellyfish
Surprised? I know it may seem like sharks are the obvious answer for dangerous sea creatures, but when it comes to the Box Jellyfish, it's a whole other story. Answer: According to the National Oceanic and Atmospheric Administration, the Australian box jellyfish is the most venomous marine animal. The Box Jellyfish lives in the Indo-Pacific region and northern Australia. As such, more people are killed in Australia by the Jellyfish than snakes, sharks and crocodiles...combined! How is this possible? Well, one part is the location. As noted, they live in the coastal waters of Australia and many people are out and about swimming. The Box Jellyfish have about 60 tentacles on their body, and each of them can extend to about 15 feet long. Which means you don't even have to be close to the head of it for the creature to kill you. Each tentacle! 60 times 50, you do the math! (Also watch out for the Irukandji jellyfish!) Many people also die in the Philippines from box jellyfish stings, as well as Indonesia but they are not required to have death certificates so data is hard to get. No matter what way you look at it, these creatures are deadly, and their toxins can wreak havoc on the toughest of creatures. Also I have bad news for you, they are are starting to be found in other parts of the ocean, including the coast of the US. While it might not be something we need to worry about, you never know what the consequences will be as the ocean waters get warmer.
From aggressive fish with a mouthful of teeth, to the most venomous marine animal, here are 8 sea creatures you should watch out for!
8. Titan Triggerfish
There's a misconception when swimming in the ocean that it's "obvious" which creatures will attack you and which ones won't. Like the Titan Triggerfish. Take a look at it. What do you think? Looks like a pretty regular fish right? Exactly! Plus, if you do a little research on Triggerfish as a species, they're actually pretty friendly fish, but this one is in a league of its own, and not in a good way. The Titan Triggerfish are wired to be very territorial, and as such, they'll go to great lengths in order to protect what is theirs. So you have to be careful if they’re in a bad mood!! They can grow to about a foot in length, and use their teeth to attack anyone or anything that they think is an “intruder". And they can be quite vicious too, because their teeth are incredibly sharp, and their jaws can clamp down with a ton of force. They can be found in most of the Indo-Pacific and usually are shy around divers. But if its reproductive season and divers are lurking around their nests, all bets are off. They're so territorial and protective that they've been known to attack divers who come anywhere close to their homes. And experienced divers look out for these fish whenever they go close to their reefs because their bite can be toxic and cause paralysis. Good news is, they like to attack the colorful parts like fins, which helps reduce the risk of personal injury. However, some unlucky divers have been knocked out cold!
7. Flower Urchin
While some creatures might look like harmless plants, be careful because appearances can be deceiving!! The flower urchin looks like a nice little bouquet of flowers, and it is one of the most frequently encountered sea urchins. Which is not that great because these echinoderms know how to attack when the time is right! There are spines sticking out of their “flowers" which are anything but decorative. The flower urchin is the “World’s Most Venomous” sea urchin and if their venom gets into your body, you're in for a very rough ride. The venom is known to causes spasms in humans, and that's just the beginning. You can also get convulsions, suffer from drowning, go through shock, get paralyzed, and yes, you can also die. And it doesn't take much to get the venom in you, all it takes is the tiniest contact with your bare skin. Flower Urchins have caused many deaths over the years, and this has made them infamous among divers. Good news is that sea urchins are defensive creatures, they aren’t trying to hurt you on purpose so if you do get jabbed, it’s most likely your fault. Just trust me, and don't go near this thing. And now for number 6, but first can you name the most venomous marine animal? Let us know your answer in the comments below! The answer is coming up! And if you are new here, welcome, and be sure to subscribe so you don’t miss out on the latest videos!!
6. Eels
Eels are special creatures, and there are many different types of them living underneath the waters. And many you need to be careful of. Some just like to strike, but others, like the Electric Eel, like to just send a shock through your system. The Electric Eel is a creature that can well and truly charge itself up for an attack, and given that you're most likely underwater when you meet this creature, it means the attack is all the more potent. The cells within their bodies build up electrolytes, and when they build up about 6000 of them, they can release a 600-volt charge into an enemy. They also emit a low-level charge that they use like radar. Plus they can grow up to 8 feet long! Eels can be very hostile, and they have been known to attack humans at times. And 600 volts to a human can do some serious damage, not the least of which is stopping your heart flat. So if you see an eel, swim the other way! Just in case!
5. Barracuda
Barracuda are pretty recognizable fish. Not only does it get a bad rap because it killed Nemo’s family, but also because of it’s razor sharp teeth and long shiny body. Of all the different types of Barracuda, the Great Barracuda is the most impressive. After all, it has the name "Great" in it. This creature can be up to six feet long, which is pretty menacing on its own, but its trademark is its speed. It cuts through water like a bullet does through air. It'll race towards anything and either slam into it, or bite it with its teeth, which as you can see are numerous, and razor sharp! In reality barracudas are not the most dangerous creature you will encounter but they have a very bad reputation. There have been about 25 reported attacks in the last 100 years, so why are they so scary? Because they are dangerous by design! They are often accused of attacking humans, even when they're not provoked. They are attracted to shiny objects because it looks like the reflection of a fish belly. Always avoid wearing any jewelry while diving!! Some divers and snorkelers have been attacked around their head as the barracuda tries to get to the object. They'll strike at them like they stole something. They might also mistake white, pale skin for fish skin. They will often get into fights with people fishing with spears as they try to get to the kill. There are even reports of Barracudas jumping out of the ocean to attack people on boats. They’re not scared of anything! And they’re kind of mean.
4. Pufferfish
There are many fish in the oceans that scare people away, but for entirely different reasons. While an eel or a barracuda is a physical threat, a Pufferfish is a threat inside and out. On the outside, the Puffer Fish has plenty of spines, and if threatened, such as when a human approaches it, it'll fill itself with water and even air, to make it look much larger than before. It’s more of a death sentence if you try to swallow it, but actually I think it’s kind of cute. Then, there's what's on the inside. Mainly, poison, lots of it. While many creatures have poison in them, it's usually located to a central area, like how snakes have venom in their fangs and can have them milked without harming the meat inside. For Pufferfish though, some species have poison all over their entire bodies. Tetrodotoxin to be exact which is 1200 times more poisonous than cyanide. There is enough toxin in one pufferfish to kill 30 adult humans. And there is no known antidote. Selling Pufferfish meat is outlawed in most countries, for our own good. Why? Well, it's because though you can get rid of poison in meat, the Pufferfish has it so completely intertwined with its being that if you fail in any way to get the poison all out, you will die. Currently, the only places that serve Puffer Fish are Japan, China, and Korea. Known as fugu, it is only prepared by licensed chefs who are specifically trained to handle Pufferfish. Even so, there are several deaths annually.
3. Stingray
The Stingray is one creature that everyone should fear and respect. While their attacks are rare, they do happen, and like some other creatures on this list, they’re not afraid of attacking when they feel provoked. The most famous case of a Stingray attack was the strike and killing of beloved zookeeper and animal conservationist Steve Irwin, aka the Crocodile Hunter. Irwin was underwater doing some filming for a show that was going to be called "Ocean's Deadliest", he was also going to film some footage for his daughter Bindi, who had a show herself. Irwin was famous for his ability to read a situation and interact with animals, and according to his crew, he gave the Stingray in question plenty of room. Irwin was just trying to get a shot of the Stingray swimming away from the camera. However, as he did so, the Stingray became defensive, and started flailing its tail around, and when it did, one strike caught Irwin in the heart. He quickly pulled it out, which was maybe the worst thing he could do. Despite the quick actions of his crew, Irwin passed away. It was very much a freak accident because you can be struck by a stingray barb and survive. But the barb slipped in between Irwin's rib cage. It’s hard to survive a direct hit to the heart. Rays also have venom in their barbs, which is not necessarily fatal, but it hurts a lot. It has enzymes and seratonin which make your muscles severly contract. Heat breaks down the venom and can limit the amount of damage. But if you are stung by an internal organ, your chances of survival will plummet.
2. Sharks
You don’t need me to tell you about sharks! While you can argue that sharks have always been feared, it was "Jaws" that helped bring the hysteria of sharks attacking humans to life. Which is actually kind of ironic, as most shark species DON'T attack humans, even when provoked. Shark attacks are actually pretty low when you look at statistics from around the world. But still, just because they don't attack a lot, doesn't mean they don't attack at all. And when they do attack, it makes worldwide news. Once one attack happens, everyone seems to freak out! Others get scared of the water, and I’m sure you’ve likely heard of one shark bite story or another. So the question is, what shark species attack humans the most? Well, that would be Great White Sharks, Tiger Sharks, and Bull Sharks. But that doesn't mean that's the order of most attacks animal. Great White Sharks are the most infamous sharks on the planet, thanks to Jaws, but the Tiger and Bull are just as fearsome, and arguably more aggressive than their Great White brethren. In fact, more people are killed by dogs than by Great White Sharks every year. Still though, these sharks are known to attack people, whether it be for territory, for food, or just basic animal instinct. As always though, we are way more of a threat to them, then they are to us.
1. Box Jellyfish
Surprised? I know it may seem like sharks are the obvious answer for dangerous sea creatures, but when it comes to the Box Jellyfish, it's a whole other story. Answer: According to the National Oceanic and Atmospheric Administration, the Australian box jellyfish is the most venomous marine animal. The Box Jellyfish lives in the Indo-Pacific region and northern Australia. As such, more people are killed in Australia by the Jellyfish than snakes, sharks and crocodiles...combined! How is this possible? Well, one part is the location. As noted, they live in the coastal waters of Australia and many people are out and about swimming. The Box Jellyfish have about 60 tentacles on their body, and each of them can extend to about 15 feet long. Which means you don't even have to be close to the head of it for the creature to kill you. Each tentacle! 60 times 50, you do the math! (Also watch out for the Irukandji jellyfish!) Many people also die in the Philippines from box jellyfish stings, as well as Indonesia but they are not required to have death certificates so data is hard to get. No matter what way you look at it, these creatures are deadly, and their toxins can wreak havoc on the toughest of creatures. Also I have bad news for you, they are are starting to be found in other parts of the ocean, including the coast of the US. While it might not be something we need to worry about, you never know what the consequences will be as the ocean waters get warmer.
15 MOST VENOMOUS SNAKES IN THE WORLD
15 MOST VENOMOUS SNAKES IN THE WORLD
From the most poisonous snake on Earth to the most dangerously aggressive species, we count 15 of the world's deadliest most venomous snakes, based on their behavior and venom potency.
Number 15. The King Cobra
This species is the world's longest venomous snake, reaching up to 5.7m (18.7ft). Despite the word Cobra in its name, this snake is not part of the True Cobra family. Mainly feeding on lizards and rodents, the King Cobra tends to avoid human contact but does have a fearsome reputation. Although not every bite can be venomous, an untreated venomous bite from this serpent has a fatality rate of 50-60%.
Number 14. The Eastern Diamondback Rattlesnake
This venomous pit viper is found mainly in southeast United States. It's the heaviest venomous snake in America and the largest Rattlesnake species. They can measure over 2.1m (6.8ft) long and weigh up to 15.4kg (34lb). One popular myth is that these snakes must rattle before striking but in fact they're actually quite capable of striking while remaining completely silent. Symptoms of a bite from these snakes include instant pain like two hot needles, bleeding from the mouth, hypotension, a weak pulse, swelling and severe pain in the affected limb.
Number 13. The Death Adder
Native to Australia, New Guinea and nearby islands, Death Adders are among the most venomous snakes in the world. Unlike most snakes, Death Adders don't actively hunt but prefer to lie in ambush and draw their prey to them. Their venomous bite injects a strong neurotoxin that causes paralysis, which seems minor at first but can cause death from a complete respiratory shutdown within six hours.
Number 12. Jameson's Mamba
This snake is very quick and highly venomous. Normally found in trees and thickets in central African rainforests, this species of green mamba is extremely alert and highly nervous. If they feel threatened they'll get very aggressive, lifting their head off the ground, hissing loudly and striking repeatedly. Their venom contains both neurotoxins and cardiotoxins that can be deadly in as little as 30 minutes.
Number 11. The Philippine Cobra
Also called the Northern Philippine Cobra as it's found mainly in the northern regions of the Philippines. This stocky snake is a highly venomous spitting cobra, capable of accurately spitting their venom at targets up to 3m (9.8ft) away. As their venom contains a potent neurotoxin, symptoms of a bite can cause severe headache, vomiting, dizziness and difficulty breathing. Complete respiratory failure can occur in as little as 30 minutes.
Number 10. The Saw-Scaled Viper
These venomous vipers can be found in the dry regions of Africa, the Middle East and India. Saw-Scaled Vipers are responsible for causing the most snakebite cases and deaths in the world. They're relatively small snakes, reaching about 90cm (35in) in length but their bites can be quite nasty. Consisting mainly of hemotoxins, their venom destroys red blood cells and disrupt blood clotting. The amount of venom they produce varies, the lethal dose for humans is about 4mg but they normally produce somewhere between 6mg and 35mg.
Number 9. The Caspian Cobra
This is the most venomous species of cobra in the world. Also called the Central Asian Cobra or Oxus Cobra, they're found mainly in the Transcaspian region of Central Asia. This snake is generally very aggressive and bad-tempered. Although they try to avoid humans, they will fiercely strike repeatedly if they feel threatened. Their venom contains the usual potent neurotoxins but also contains cytotoxins which causes tissue-death and necrosis. If bitten by this cobra you'd have a 75% chance of dying in less than an hour.
Number 8. The Tiger Snake
This snake is found in southern Australia and Tasmania. They're highly variable in color, often banded like a tiger. Their venom possess potent toxins, including neurotoxins, coagulants, haemolysins and myotoxins. Symptoms of a bite include localized pain, tingling, numbness and sweating, followed by a fairly rapid onset of paralysis. If left untreated, there's about a 60% chance of dying.
Number 7. Eastern Green Mamba
Also known as the common mamba, this species is quite large at an average length of 2m (6.6ft). Like all other species of mamba, the Eastern Green Mamba is highly venomous. Their extremely rapid-acting venom contains pre-synaptic and post-synaptic neurotoxins along with other toxins that can cause convulsions and rapid fatal paralysis in just 30 minutes. They produce enough venom to kill several humans in a single bite.
Number 6. The Black Mamba
Found in Africa, this snake is the second longest venomous snake, and one of the fastest moving snakes in the world, capable of moving at 11km/h that's 6.8 mph. Being a mamba their venom is very potent as you'd expect but it's also extremely fast-acting. Capable of killing a human in just 20 minutes. Without treatment with antivenom, you're pretty much guaranteed to die within an hour.
Number 5. The Common Krait
Also known as the Blue Krait or Indian Krait, this snake is a member of the 'Big Four', species inflicting the most snakebites on humans in India. They can grow up to 1.75m (5.7ft) and generally look black or blue with white stripes. Containing powerful neurotoxins, their bites are often painless. Victims will complain of severe abdominal cramps, accompanied by gradual paralysis and if left untreated has an 80% chance of dying within 5 hours.
Number 4. Daboia
Also known as Russell's Viper or Chain Viper this is another member of the 'Big Four' snakes of India. They produce considerable amounts of venom but it's quite slow acting, gradually causing organ failure in its victims. Signs like pain and swelling occur at the bite, followed by bleeding gums within 20 minutes. But death normally occurs from septicemia and organ failure, between 1 to 14 days after the bite occurred.
Number 3. The Coastal Taipan
Also known as the Common Taipan is the third most venomous snake in the world. Found in Northern Australia and New Guinea, this snake can reach lengths of up to 3.3m (10.8ft). Feeding mainly on warm blooded mammals, their highly potent venom causes severe internal bleeding and because it always delivers a fatal dose, death normally occurs within 30 minutes.
Number 2. The Eastern Brown Snake
Often referred to as the Common Brown Snake, it is considered the world's second most venomous land snake. Native to Australia and Indonesia these snakes are fast and aggressive. Although the venom is extremely toxic and fatal, this species tends to initiate their defense with non-fatal bites first. However it would be like playing Russian Roulette, a bite would have a 20% chance to kill you, so if you don't die the first time, I wouldn't suggest hanging around.
Number 1. The Inland Taipan
Commonly known as the Western Taipan and found in central east Australia. Its venom, drop for drop, is by far the most toxic of any snake or reptile on Earth. Unlike most snakes, the Inland Taipan's venom is specially adapted to kill warm blooded species. The venom from a single bite is lethal enough to kill at least 100 men. Causing paralysis, brain hemorrhaging, anaphylactic shock and cardiac arrest, death normally occurs in just 30 minutes.
From the most poisonous snake on Earth to the most dangerously aggressive species, we count 15 of the world's deadliest most venomous snakes, based on their behavior and venom potency.
Number 15. The King Cobra
This species is the world's longest venomous snake, reaching up to 5.7m (18.7ft). Despite the word Cobra in its name, this snake is not part of the True Cobra family. Mainly feeding on lizards and rodents, the King Cobra tends to avoid human contact but does have a fearsome reputation. Although not every bite can be venomous, an untreated venomous bite from this serpent has a fatality rate of 50-60%.
Number 14. The Eastern Diamondback Rattlesnake
This venomous pit viper is found mainly in southeast United States. It's the heaviest venomous snake in America and the largest Rattlesnake species. They can measure over 2.1m (6.8ft) long and weigh up to 15.4kg (34lb). One popular myth is that these snakes must rattle before striking but in fact they're actually quite capable of striking while remaining completely silent. Symptoms of a bite from these snakes include instant pain like two hot needles, bleeding from the mouth, hypotension, a weak pulse, swelling and severe pain in the affected limb.
Number 13. The Death Adder
Native to Australia, New Guinea and nearby islands, Death Adders are among the most venomous snakes in the world. Unlike most snakes, Death Adders don't actively hunt but prefer to lie in ambush and draw their prey to them. Their venomous bite injects a strong neurotoxin that causes paralysis, which seems minor at first but can cause death from a complete respiratory shutdown within six hours.
Number 12. Jameson's Mamba
This snake is very quick and highly venomous. Normally found in trees and thickets in central African rainforests, this species of green mamba is extremely alert and highly nervous. If they feel threatened they'll get very aggressive, lifting their head off the ground, hissing loudly and striking repeatedly. Their venom contains both neurotoxins and cardiotoxins that can be deadly in as little as 30 minutes.
Number 11. The Philippine Cobra
Also called the Northern Philippine Cobra as it's found mainly in the northern regions of the Philippines. This stocky snake is a highly venomous spitting cobra, capable of accurately spitting their venom at targets up to 3m (9.8ft) away. As their venom contains a potent neurotoxin, symptoms of a bite can cause severe headache, vomiting, dizziness and difficulty breathing. Complete respiratory failure can occur in as little as 30 minutes.
Number 10. The Saw-Scaled Viper
These venomous vipers can be found in the dry regions of Africa, the Middle East and India. Saw-Scaled Vipers are responsible for causing the most snakebite cases and deaths in the world. They're relatively small snakes, reaching about 90cm (35in) in length but their bites can be quite nasty. Consisting mainly of hemotoxins, their venom destroys red blood cells and disrupt blood clotting. The amount of venom they produce varies, the lethal dose for humans is about 4mg but they normally produce somewhere between 6mg and 35mg.
Number 9. The Caspian Cobra
This is the most venomous species of cobra in the world. Also called the Central Asian Cobra or Oxus Cobra, they're found mainly in the Transcaspian region of Central Asia. This snake is generally very aggressive and bad-tempered. Although they try to avoid humans, they will fiercely strike repeatedly if they feel threatened. Their venom contains the usual potent neurotoxins but also contains cytotoxins which causes tissue-death and necrosis. If bitten by this cobra you'd have a 75% chance of dying in less than an hour.
Number 8. The Tiger Snake
This snake is found in southern Australia and Tasmania. They're highly variable in color, often banded like a tiger. Their venom possess potent toxins, including neurotoxins, coagulants, haemolysins and myotoxins. Symptoms of a bite include localized pain, tingling, numbness and sweating, followed by a fairly rapid onset of paralysis. If left untreated, there's about a 60% chance of dying.
Number 7. Eastern Green Mamba
Also known as the common mamba, this species is quite large at an average length of 2m (6.6ft). Like all other species of mamba, the Eastern Green Mamba is highly venomous. Their extremely rapid-acting venom contains pre-synaptic and post-synaptic neurotoxins along with other toxins that can cause convulsions and rapid fatal paralysis in just 30 minutes. They produce enough venom to kill several humans in a single bite.
Number 6. The Black Mamba
Found in Africa, this snake is the second longest venomous snake, and one of the fastest moving snakes in the world, capable of moving at 11km/h that's 6.8 mph. Being a mamba their venom is very potent as you'd expect but it's also extremely fast-acting. Capable of killing a human in just 20 minutes. Without treatment with antivenom, you're pretty much guaranteed to die within an hour.
Number 5. The Common Krait
Also known as the Blue Krait or Indian Krait, this snake is a member of the 'Big Four', species inflicting the most snakebites on humans in India. They can grow up to 1.75m (5.7ft) and generally look black or blue with white stripes. Containing powerful neurotoxins, their bites are often painless. Victims will complain of severe abdominal cramps, accompanied by gradual paralysis and if left untreated has an 80% chance of dying within 5 hours.
Number 4. Daboia
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| เพิ่มคำอธิบายภาพ |
Also known as Russell's Viper or Chain Viper this is another member of the 'Big Four' snakes of India. They produce considerable amounts of venom but it's quite slow acting, gradually causing organ failure in its victims. Signs like pain and swelling occur at the bite, followed by bleeding gums within 20 minutes. But death normally occurs from septicemia and organ failure, between 1 to 14 days after the bite occurred.
Number 3. The Coastal Taipan
Also known as the Common Taipan is the third most venomous snake in the world. Found in Northern Australia and New Guinea, this snake can reach lengths of up to 3.3m (10.8ft). Feeding mainly on warm blooded mammals, their highly potent venom causes severe internal bleeding and because it always delivers a fatal dose, death normally occurs within 30 minutes.
Number 2. The Eastern Brown Snake
Often referred to as the Common Brown Snake, it is considered the world's second most venomous land snake. Native to Australia and Indonesia these snakes are fast and aggressive. Although the venom is extremely toxic and fatal, this species tends to initiate their defense with non-fatal bites first. However it would be like playing Russian Roulette, a bite would have a 20% chance to kill you, so if you don't die the first time, I wouldn't suggest hanging around.
Number 1. The Inland Taipan
Commonly known as the Western Taipan and found in central east Australia. Its venom, drop for drop, is by far the most toxic of any snake or reptile on Earth. Unlike most snakes, the Inland Taipan's venom is specially adapted to kill warm blooded species. The venom from a single bite is lethal enough to kill at least 100 men. Causing paralysis, brain hemorrhaging, anaphylactic shock and cardiac arrest, death normally occurs in just 30 minutes.
10 MOST VENOMOUS SNAKES ON EARTH
10 MOST VENOMOUS SNAKES ON EARTH
From the lethal bites of Australian serpents to the fatal sting of the India's National Reptile, today we look at the Most Venomous Snakes On Earth.
10. Belcher's Sea Snake
Unlike some of the highly aggressive entries featured on this list, Belcher's Sea Snake, or the faint-banded sea snake as it's also called, is much more docile. A mistake in a 1996 first edition of a Smithsonian guide to snakes started the rumor that this was actually the most poisonous snake in the world. In reality, it's venom is much less dangerous than ones belonging to the majority of snakes on this list, and even then it will refrain from injecting venom in most of its bites.
Venom is measured by the amount of toxin required to prove lethal for half of a sample group of animals. This is called an LD50 test. This is a relatively crude, barbaric experiment for testing venom lethality, as well as rife with outstanding variables such as how the toxin is administered with varieties ranging from muscle to vein to fat injections, or even forced inhalation or feeding. But despite this, it remains the main route by which the world measures the deadliness of venom. The true danger of the snake's venom is uncertain as data surrounding its LD50 results are scarce and difficult to compare to other venoms, while rumors continue to run rampant regarding its danger. Many online sources still frame the Belcher's sea snake as the deadliest, but in reality, it has nowhere near the most lethal of snakebites in the world.
9. Green Mamba
Not quite as nasty as it's notorious onyx-colored cousin, the brilliant Green Mamba is still quite dangerous. Armed with a mix of neurotoxins and cardiotoxins , the green mamba's bite targets the body's organ functions, first causing disorientation through dizziness and nausea before graduating to a swollen throat, a shift in heartbeat patterns, and eventually convulsions and respiratory paralysis.
Fatal results aren't always guaranteed once bitten, however untreated bites are thought to have a high mortality rate. Thankfully, the afflicted area bit by a green mamba tends to swell, making the danger associated with its venom a bit easier to identify and hopefully allow for the application of an antidote. Still, this species has very long front fangs that the snake actually has some control over, making more severe envenoming strikes a likely occurrence. In this case, more often than not the effects set in rapidly, and the bitten victim may perish in as little time as 30 minutes.
8. Boomslang
Hanging from the trees of Sub-Saharan Africa is a green and black serpent with a subtle yet treacherous bite. Known as the Boomslang, this species of snake is the only one of its family to prove harmful to humans. Normally found to have a set of inept fangs and a compact venom gland, the boomslang is the outlier among the Colubridae family with massive syringe-like injectors that protrude from the back of its mouth. The venom it produces takes time to process, but the symptoms are severe and can consist of headaches, sleepiness, and even mental disorders.
Mostly a hemotoxin , the boomslang's volatile injection can also stall the coagulation of wounds, leading to a lethal end by external or internal bleeding. It can also cause hemorrhaging of the brain and other muscles. Due to the hours it takes for the symptoms to set in, victims are often lulled into a false sense of safety, thinking it to be a venomless strike called a dry bite. As a result, those struck by a boomslang's venom sometimes fail to receive the antivenom they need in time. Luckily for the public, though, this snake remains relatively tepid, not too territorial, and will only strike if handled or threatened directly.
7. Gwardar
Often referred to as the western brown snake, the Australian colloquially named Gwardar was christened as such after the Aboriginal advice given to those who would run into such a snake, translating to: "go the long way around." While it may be typically shy, this would still serve as great advice given this snake's penchant for speed. Quick to take the defensive, and even quicker to strike, this highly alert species doesn't need much to get nervous. The gwardar comes in a small variety of looks, but will on average grow close to six feet in length.
Its scales feature an orange-brown hue and the head will either feature a small black V shape on the back or be covered entirely by a coat of black scales. Found all across the continent of Australia, these deadly reptiles are found in forests, grasslands, and urban areas alike. It doesn't have the most deadly venom around, but the gwardar delivers it in high doses through its tiny fangs. This can turn fatal as bleeding complications, abdominal pain, and even kidney damage will occur with severity dependant on the amount of venom injected. But instead of risking it and hoping for a low dosage, next time you're in the outback, just follow the advice and gwardar !
6. Rattlesnake
Infamous for its namesake noisy appendage, the Rattlesnake is actually a type of pit viper, and a highly venomous one at that. Populating forests and deserts from Alberta down to Argentina, all 36 species of the rattlesnake are endemic to the Americas. Unlike other snakes who may take time and maturity to develop their complex venoms, adolescents of this species are born with functioning fangs and venom able to execute at birth.
The venom, like others, results in decaying tissue and blood clotting impediments. But some species of rattlesnake have even been known to cause paralysis with their penetrating strike. Rattlesnake venom is very complex in general, usually containing a mixture of up to 15 different enzymes. The toxins contain immobilizing and digestive components as well, making sure to not only injure their prey but also to slow down and tenderize it as well. But even with all their neat tricks, many species of rattlesnake are endangered today as a majority of their native habitat has been invaded for the past century by what may be their greatest threat: the automobile.
5. Black Mamba
This snake is considered to be the most dangerous and fear-inducing snake in Africa. But their seclusion and timidness keep Black Mamba snakebite rates low, luckily for the public. These snakes are often identified by their coffin-esque heads and long slender bodies which average at around 8 feet in length and max out at almost 15 feet! One feature you can't rely on to recognize a black mamba, though, is its color. Somewhat of a misnomer, black mamba's are rarely black, often appearing in olive, brown, khaki or grey shades. Adolescents can be found wearing lighter hues of these colors with adults darkening as they age.
If you can't spot a black mamba from its look, though, hope you never have to try to identify by its venom. Before the advent of antivenom for this species, its bite was 100% lethal. Without treatment, its victims will typically pass within seven to fifteen hours of being bitten, and some reports as recent as 2008 tell of victims having a heart attack within one hour of envenomation. Those struck by a black mamba's bite will experience abnormal skin sensations like pins pricking them or a limb falling asleep. They'll then often begin to lose motor functions until an erratic heart rate will set in, often leading to cardiac or respiratory failure.
4. Tiger Snake
Usually sporting a thick, blunt head and even thicker, yellowish-striped body, the Tiger Snake of Australia also has numerous variations in physical appearance depending on its inhabited region. Tasmanian tiger snakes, for example, are typically dark brown or black with faint banding stripes. Meanwhile the Western tiger snake is a much deeper black with bright yellow bands and a yellow stomach.
But no matter the look, these snakes at least share one thing in common: their terrifying venom. The mortality rate of untreated tiger snake bites is about 40 to 60 percent, though given their common occurrence in Australia, fatalities are few and far between. This wasn't always the case, but since the introduction of a specific Tasmanian antivenom used to treat all Tasmanian snakebites, tiger snake casualties have lessened considerably in the 21st century.
3. King Cobra
As the longest venomous snake at a maximum length of more than 19 feet, armed with a grizzled, growling hiss and its iconic hood, the King Cobra is truly majestic. And in proper fashion, its venomous bite is a royal pain in the keister . Sometimes only taking a matter of 30 minutes to set in, the symptoms induced from the venom of India's national reptile can send a victim from feeling a bit tired and dizzy to paralysis and into a coma in no time. Some antivenoms exist, but they are luckily rarely needed as very few envenomed snakebites occur with this breed. In fact, king cobras are mainly interested in eating other snakes like rat snakes, pythons and pit vipers. Still, snake charmers are commonly found throughout India and they make up a good portion of all reported king cobra bites.
2. Saw-Scaled Viper
While relatively small in size, this snake is at the top of the big four of India and one of the deadliest in the world, contributing to more snakebite mortalities than any other serpent. Found often in populated areas, the Saw-Scaled Viper crawls low and deliberate with acute alertness, giving inspiration to its other name: the carpet viper. These creatures sidewind to make there way around, keeping part of their body ever still in case of a potential predator...or prey.
At a maximum of length of just under three feet and brown, gray, or olive patterned skin flecked with white, the saw-scaled viper lurks unseen near cities throughout Africa, India, Pakistan, Sri Lanka, and the Middle East. Another unique trait of this species comes from one of its primary defense mechanisms. Living up to its namesake, these vipers will grind their scales together like a rigid saw when threatened, creating a coarse, foreboding warning sound towards the aggressors.
Though they still won't give you time to react as they prove notoriously easy to agitate. Victims that suffer a bite from the saw-scaled viper experience profuse bleeding as chemicals in the venom block blood from clotting. These bites can result in permanent damage or loss of an organ, necrosis, extreme pain and swelling, and even a cerebral hemorrhage , making this tiny snake's bite as violent as it is lethal.
1. Inland Taipan
Commonly called the fierce snake, this Australian native is definitively the most venomous snake in the world. Based on venom measurements, it only requires two and a half hundredths of a milligram per kilogram of the target's weight to cause ones demise, and in some tests only one hundredth of a milligram was needed. That means an average 75 kilogram, or about 165 pound, person would only require, at most, about a 1.875 milligrams of venom to meet their end. To make matters even more frightening, the Inland Taipan can administer an average of 44 milligrams per bite, and has a maximum recorded dose of 110 milligrams!
From the lethal bites of Australian serpents to the fatal sting of the India's National Reptile, today we look at the Most Venomous Snakes On Earth.
10. Belcher's Sea Snake
Unlike some of the highly aggressive entries featured on this list, Belcher's Sea Snake, or the faint-banded sea snake as it's also called, is much more docile. A mistake in a 1996 first edition of a Smithsonian guide to snakes started the rumor that this was actually the most poisonous snake in the world. In reality, it's venom is much less dangerous than ones belonging to the majority of snakes on this list, and even then it will refrain from injecting venom in most of its bites.
Venom is measured by the amount of toxin required to prove lethal for half of a sample group of animals. This is called an LD50 test. This is a relatively crude, barbaric experiment for testing venom lethality, as well as rife with outstanding variables such as how the toxin is administered with varieties ranging from muscle to vein to fat injections, or even forced inhalation or feeding. But despite this, it remains the main route by which the world measures the deadliness of venom. The true danger of the snake's venom is uncertain as data surrounding its LD50 results are scarce and difficult to compare to other venoms, while rumors continue to run rampant regarding its danger. Many online sources still frame the Belcher's sea snake as the deadliest, but in reality, it has nowhere near the most lethal of snakebites in the world.
9. Green Mamba
Not quite as nasty as it's notorious onyx-colored cousin, the brilliant Green Mamba is still quite dangerous. Armed with a mix of neurotoxins and cardiotoxins , the green mamba's bite targets the body's organ functions, first causing disorientation through dizziness and nausea before graduating to a swollen throat, a shift in heartbeat patterns, and eventually convulsions and respiratory paralysis.
Fatal results aren't always guaranteed once bitten, however untreated bites are thought to have a high mortality rate. Thankfully, the afflicted area bit by a green mamba tends to swell, making the danger associated with its venom a bit easier to identify and hopefully allow for the application of an antidote. Still, this species has very long front fangs that the snake actually has some control over, making more severe envenoming strikes a likely occurrence. In this case, more often than not the effects set in rapidly, and the bitten victim may perish in as little time as 30 minutes.
8. Boomslang
Hanging from the trees of Sub-Saharan Africa is a green and black serpent with a subtle yet treacherous bite. Known as the Boomslang, this species of snake is the only one of its family to prove harmful to humans. Normally found to have a set of inept fangs and a compact venom gland, the boomslang is the outlier among the Colubridae family with massive syringe-like injectors that protrude from the back of its mouth. The venom it produces takes time to process, but the symptoms are severe and can consist of headaches, sleepiness, and even mental disorders.
Mostly a hemotoxin , the boomslang's volatile injection can also stall the coagulation of wounds, leading to a lethal end by external or internal bleeding. It can also cause hemorrhaging of the brain and other muscles. Due to the hours it takes for the symptoms to set in, victims are often lulled into a false sense of safety, thinking it to be a venomless strike called a dry bite. As a result, those struck by a boomslang's venom sometimes fail to receive the antivenom they need in time. Luckily for the public, though, this snake remains relatively tepid, not too territorial, and will only strike if handled or threatened directly.
7. Gwardar
Often referred to as the western brown snake, the Australian colloquially named Gwardar was christened as such after the Aboriginal advice given to those who would run into such a snake, translating to: "go the long way around." While it may be typically shy, this would still serve as great advice given this snake's penchant for speed. Quick to take the defensive, and even quicker to strike, this highly alert species doesn't need much to get nervous. The gwardar comes in a small variety of looks, but will on average grow close to six feet in length.
Its scales feature an orange-brown hue and the head will either feature a small black V shape on the back or be covered entirely by a coat of black scales. Found all across the continent of Australia, these deadly reptiles are found in forests, grasslands, and urban areas alike. It doesn't have the most deadly venom around, but the gwardar delivers it in high doses through its tiny fangs. This can turn fatal as bleeding complications, abdominal pain, and even kidney damage will occur with severity dependant on the amount of venom injected. But instead of risking it and hoping for a low dosage, next time you're in the outback, just follow the advice and gwardar !
6. Rattlesnake
Infamous for its namesake noisy appendage, the Rattlesnake is actually a type of pit viper, and a highly venomous one at that. Populating forests and deserts from Alberta down to Argentina, all 36 species of the rattlesnake are endemic to the Americas. Unlike other snakes who may take time and maturity to develop their complex venoms, adolescents of this species are born with functioning fangs and venom able to execute at birth.
The venom, like others, results in decaying tissue and blood clotting impediments. But some species of rattlesnake have even been known to cause paralysis with their penetrating strike. Rattlesnake venom is very complex in general, usually containing a mixture of up to 15 different enzymes. The toxins contain immobilizing and digestive components as well, making sure to not only injure their prey but also to slow down and tenderize it as well. But even with all their neat tricks, many species of rattlesnake are endangered today as a majority of their native habitat has been invaded for the past century by what may be their greatest threat: the automobile.
5. Black Mamba
This snake is considered to be the most dangerous and fear-inducing snake in Africa. But their seclusion and timidness keep Black Mamba snakebite rates low, luckily for the public. These snakes are often identified by their coffin-esque heads and long slender bodies which average at around 8 feet in length and max out at almost 15 feet! One feature you can't rely on to recognize a black mamba, though, is its color. Somewhat of a misnomer, black mamba's are rarely black, often appearing in olive, brown, khaki or grey shades. Adolescents can be found wearing lighter hues of these colors with adults darkening as they age.
If you can't spot a black mamba from its look, though, hope you never have to try to identify by its venom. Before the advent of antivenom for this species, its bite was 100% lethal. Without treatment, its victims will typically pass within seven to fifteen hours of being bitten, and some reports as recent as 2008 tell of victims having a heart attack within one hour of envenomation. Those struck by a black mamba's bite will experience abnormal skin sensations like pins pricking them or a limb falling asleep. They'll then often begin to lose motor functions until an erratic heart rate will set in, often leading to cardiac or respiratory failure.
4. Tiger Snake
Usually sporting a thick, blunt head and even thicker, yellowish-striped body, the Tiger Snake of Australia also has numerous variations in physical appearance depending on its inhabited region. Tasmanian tiger snakes, for example, are typically dark brown or black with faint banding stripes. Meanwhile the Western tiger snake is a much deeper black with bright yellow bands and a yellow stomach.
But no matter the look, these snakes at least share one thing in common: their terrifying venom. The mortality rate of untreated tiger snake bites is about 40 to 60 percent, though given their common occurrence in Australia, fatalities are few and far between. This wasn't always the case, but since the introduction of a specific Tasmanian antivenom used to treat all Tasmanian snakebites, tiger snake casualties have lessened considerably in the 21st century.
3. King Cobra
As the longest venomous snake at a maximum length of more than 19 feet, armed with a grizzled, growling hiss and its iconic hood, the King Cobra is truly majestic. And in proper fashion, its venomous bite is a royal pain in the keister . Sometimes only taking a matter of 30 minutes to set in, the symptoms induced from the venom of India's national reptile can send a victim from feeling a bit tired and dizzy to paralysis and into a coma in no time. Some antivenoms exist, but they are luckily rarely needed as very few envenomed snakebites occur with this breed. In fact, king cobras are mainly interested in eating other snakes like rat snakes, pythons and pit vipers. Still, snake charmers are commonly found throughout India and they make up a good portion of all reported king cobra bites.
2. Saw-Scaled Viper
While relatively small in size, this snake is at the top of the big four of India and one of the deadliest in the world, contributing to more snakebite mortalities than any other serpent. Found often in populated areas, the Saw-Scaled Viper crawls low and deliberate with acute alertness, giving inspiration to its other name: the carpet viper. These creatures sidewind to make there way around, keeping part of their body ever still in case of a potential predator...or prey.
At a maximum of length of just under three feet and brown, gray, or olive patterned skin flecked with white, the saw-scaled viper lurks unseen near cities throughout Africa, India, Pakistan, Sri Lanka, and the Middle East. Another unique trait of this species comes from one of its primary defense mechanisms. Living up to its namesake, these vipers will grind their scales together like a rigid saw when threatened, creating a coarse, foreboding warning sound towards the aggressors.
Though they still won't give you time to react as they prove notoriously easy to agitate. Victims that suffer a bite from the saw-scaled viper experience profuse bleeding as chemicals in the venom block blood from clotting. These bites can result in permanent damage or loss of an organ, necrosis, extreme pain and swelling, and even a cerebral hemorrhage , making this tiny snake's bite as violent as it is lethal.
1. Inland Taipan
Commonly called the fierce snake, this Australian native is definitively the most venomous snake in the world. Based on venom measurements, it only requires two and a half hundredths of a milligram per kilogram of the target's weight to cause ones demise, and in some tests only one hundredth of a milligram was needed. That means an average 75 kilogram, or about 165 pound, person would only require, at most, about a 1.875 milligrams of venom to meet their end. To make matters even more frightening, the Inland Taipan can administer an average of 44 milligrams per bite, and has a maximum recorded dose of 110 milligrams!
15 MOST VENOMOUS SNAKES IN THE WORLD
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10 MOST DANGEROUS VENOMOUS SNAKE IN THE WORLD
10 MOST DANGEROUS VENOMOUS SNAKE IN THE WORLD
If we are scared of a bite, it surely has to come from a snake. Well, that’s when we aren’t considering the ones inflicted by a shark that’ll probably chomp off your entire foot, the focus is on an “innocent” bite that just leaves you paralyzed or dead! Even though not all snakes are venomous, some are and that is enough for us to be scared of them all. The scary bit is that some of them have the potential to inflict a death sentence within 30 minutes! Wanna know about the most venomous snakes in the world? ut first you need a good news, so know that most of the snakes aren’t coming to get you- they just need privacy and if you don’t come in the way, you are safe!
Number 10 Rattlesnake
The name comes from the rattle located at the end of their tails, which makes a loud rattling noise when vibrated. Take that as a warning bell, when you hear it- you run! Being a mixture of five to 15 enzymes, their venom is hemotoxic, destroying tissue, causing necrosis and coagulopathy. Rattlesnakes use their venom to immobilize and disable the prey, where their digestive enzymes break down tissue to prepare for later ingestion. If you aren’t already trembling, remember that rattlesnakes are the leading contributor to snakebite injuries in North America. Scary!
Number 9
Death Adder When a snake is named after death, you have no choice but to be scared or rather VERY scared! Native to Australia, this snake has a broad flattened, triangular head and a thick body with colored bands and reaches a maximum body length of 70–100 cm. Death adders possess the longest fangs of any Australian snake and is one of the most venomous land snakes globally. Its venom contains neurotoxin which can cause paralysis or even kill, that too within six hours after the bite. It can deliver the fastest strike among all venomous snakes recorded in Australia. Shouldn’t we be scared?
Number 8 Viper
The vipers have relatively long, hinged fangs that permit deep penetration and injection of venom. Yikes! Their venom contains an abundance of protein-degrading enzymes that cause pain, necrosis, blood loss from cardiovascular damage and disruption of the blood-clotting system. All this leads to a sudden drop in blood pressure which can cause DEATH! Doesn’t sound nice! Apart from being venomous, why else should you fear the vipers? Simple, they are one of the most widely spread snakes so your chances of encountering them are pretty high! Anybody looking forward to this meeting?
Number 7 Philippine Cobra
This 1m long snake has long cervical ribs capable of expanding, so when threatened, a hood can be formed. But that’s not why the Philippine Cobra has made it to this list, there are some interesting things awaiting your attention! Its venom can cause neurotoxicity and respiratory paralysis which start with symptoms like headache, nausea, vomiting, abdominal pain, diarrhea, dizziness, and difficulty breathing. You know what’s the most terrifying thing about this snake? They are capable of accurately spitting their venom at a target up to 3m, now that takes the “maintain distance” norm to a whole new level!
Number 6 Tiger Snake
How about we tell you that Tiger snakes accounted for 17% of identified snakebite victims in Australia between 2005 and 2015? A tiger snake’s bite causes localized pain in the foot and neck region, tingling, numbness, and sweating, followed by a fairly rapid onset of breathing difficulties and paralysis. The mortality rate from untreated bites is reported to be between 40 and 60%. That’s already too much to handle but wait for the worse. Tiger snakes give birth to 20 to 30 live young! Well, such venomous snakes should be given family planning lectures, not for them but for our life, don’t you agree?
Number 5 Black Mamba
The longest species of venomous snake indigenous to the African continent, Black Mamba grows to about 2-3m and its skin color varies from grey to dark brown. When you see a Black Mamba opening its inky-black mouth, spreading its narrow neck-flap and hissing, run for your life because the snake is feeling threatened. So what happens when the snake feels threatened from you? It might give you a series of kisses with its fangs! And since its venom is primarily composed of potent neurotoxins, it may cause a fast onset of symptoms. Even though you see them as aggressive beings, they would try to flee from humans unless cornered. Strange!
Number 4 Taipan
These large, fast-moving Australasian snakes are considered some of the most deadly snakes. They possess highly neurotoxic venom with some other toxic constituents that have multiple effects on victims. It may paralyze the victim's nervous system and clot the blood, which then blocks blood vessels. The venom in a Taipan is strong enough to kill up to 12,000 guinea pigs. Like seriously? Another problem associated with this snake is that due to its larger side, it is capable of injecting a large quantity of venom in the victim! OMG, we are scared for life!
Number 3 Blue Krait
The Blue Krait snake may attain a total length of 108 cm, with a tail 16 cm long. Dorsally, it has a pattern of 27-34 dark-brown, black, or bluish-black crossbands on the body and tail, which are narrowed and rounded on the sides. Its venom has caused an untreated mortality rate of 60-70% on humans. The venom is a neurotoxin, 16 times more potent than that of a Cobra which quickly induces muscle paralysis. Another shocking thing about them is that they hunt and kill other snakes, even cannibalizing other Kraits. A snake that is also a cannibal, fear has a new definition!
Number 2 Eastern Brown Snake
If we tell you that 1/14,000 of an ounce of its venom is enough to kill an adult human, what would be your reaction? Fear, obviously- we were just checking if you are still in your senses or have passed out already! Since its preferred habitat is along the major population centers of Australia, you have all the more reasons to fear it! Alright, we know that’s too much to bear so we decided to show you the positives. Even though the venom contains both neurotoxins and blood coagulants, less than half of bites contain venom and they prefer not to bite if at all possible. Finally some good news!
Number 1 Inland Taipan
When we say that the most venomous snake is endemic to semi-arid regions of central east Australia, it comes as no shock, right? Its venom, drop for drop, is by far the most toxic of any snake! Who would want to be anywhere near it, not us for sure! It is estimated that one bite possesses enough lethality to kill at least 100 fully grown men, and, depending on the nature of the bite, it has the potential to kill someone in as little as 30 to 45 minutes if left untreated.
If we are scared of a bite, it surely has to come from a snake. Well, that’s when we aren’t considering the ones inflicted by a shark that’ll probably chomp off your entire foot, the focus is on an “innocent” bite that just leaves you paralyzed or dead! Even though not all snakes are venomous, some are and that is enough for us to be scared of them all. The scary bit is that some of them have the potential to inflict a death sentence within 30 minutes! Wanna know about the most venomous snakes in the world? ut first you need a good news, so know that most of the snakes aren’t coming to get you- they just need privacy and if you don’t come in the way, you are safe!
Number 10 Rattlesnake
The name comes from the rattle located at the end of their tails, which makes a loud rattling noise when vibrated. Take that as a warning bell, when you hear it- you run! Being a mixture of five to 15 enzymes, their venom is hemotoxic, destroying tissue, causing necrosis and coagulopathy. Rattlesnakes use their venom to immobilize and disable the prey, where their digestive enzymes break down tissue to prepare for later ingestion. If you aren’t already trembling, remember that rattlesnakes are the leading contributor to snakebite injuries in North America. Scary!
Number 9
Death Adder When a snake is named after death, you have no choice but to be scared or rather VERY scared! Native to Australia, this snake has a broad flattened, triangular head and a thick body with colored bands and reaches a maximum body length of 70–100 cm. Death adders possess the longest fangs of any Australian snake and is one of the most venomous land snakes globally. Its venom contains neurotoxin which can cause paralysis or even kill, that too within six hours after the bite. It can deliver the fastest strike among all venomous snakes recorded in Australia. Shouldn’t we be scared?
Number 8 Viper
The vipers have relatively long, hinged fangs that permit deep penetration and injection of venom. Yikes! Their venom contains an abundance of protein-degrading enzymes that cause pain, necrosis, blood loss from cardiovascular damage and disruption of the blood-clotting system. All this leads to a sudden drop in blood pressure which can cause DEATH! Doesn’t sound nice! Apart from being venomous, why else should you fear the vipers? Simple, they are one of the most widely spread snakes so your chances of encountering them are pretty high! Anybody looking forward to this meeting?
Number 7 Philippine Cobra
This 1m long snake has long cervical ribs capable of expanding, so when threatened, a hood can be formed. But that’s not why the Philippine Cobra has made it to this list, there are some interesting things awaiting your attention! Its venom can cause neurotoxicity and respiratory paralysis which start with symptoms like headache, nausea, vomiting, abdominal pain, diarrhea, dizziness, and difficulty breathing. You know what’s the most terrifying thing about this snake? They are capable of accurately spitting their venom at a target up to 3m, now that takes the “maintain distance” norm to a whole new level!
Number 6 Tiger Snake
How about we tell you that Tiger snakes accounted for 17% of identified snakebite victims in Australia between 2005 and 2015? A tiger snake’s bite causes localized pain in the foot and neck region, tingling, numbness, and sweating, followed by a fairly rapid onset of breathing difficulties and paralysis. The mortality rate from untreated bites is reported to be between 40 and 60%. That’s already too much to handle but wait for the worse. Tiger snakes give birth to 20 to 30 live young! Well, such venomous snakes should be given family planning lectures, not for them but for our life, don’t you agree?
Number 5 Black Mamba
The longest species of venomous snake indigenous to the African continent, Black Mamba grows to about 2-3m and its skin color varies from grey to dark brown. When you see a Black Mamba opening its inky-black mouth, spreading its narrow neck-flap and hissing, run for your life because the snake is feeling threatened. So what happens when the snake feels threatened from you? It might give you a series of kisses with its fangs! And since its venom is primarily composed of potent neurotoxins, it may cause a fast onset of symptoms. Even though you see them as aggressive beings, they would try to flee from humans unless cornered. Strange!
Number 4 Taipan
These large, fast-moving Australasian snakes are considered some of the most deadly snakes. They possess highly neurotoxic venom with some other toxic constituents that have multiple effects on victims. It may paralyze the victim's nervous system and clot the blood, which then blocks blood vessels. The venom in a Taipan is strong enough to kill up to 12,000 guinea pigs. Like seriously? Another problem associated with this snake is that due to its larger side, it is capable of injecting a large quantity of venom in the victim! OMG, we are scared for life!
Number 3 Blue Krait
The Blue Krait snake may attain a total length of 108 cm, with a tail 16 cm long. Dorsally, it has a pattern of 27-34 dark-brown, black, or bluish-black crossbands on the body and tail, which are narrowed and rounded on the sides. Its venom has caused an untreated mortality rate of 60-70% on humans. The venom is a neurotoxin, 16 times more potent than that of a Cobra which quickly induces muscle paralysis. Another shocking thing about them is that they hunt and kill other snakes, even cannibalizing other Kraits. A snake that is also a cannibal, fear has a new definition!
Number 2 Eastern Brown Snake
If we tell you that 1/14,000 of an ounce of its venom is enough to kill an adult human, what would be your reaction? Fear, obviously- we were just checking if you are still in your senses or have passed out already! Since its preferred habitat is along the major population centers of Australia, you have all the more reasons to fear it! Alright, we know that’s too much to bear so we decided to show you the positives. Even though the venom contains both neurotoxins and blood coagulants, less than half of bites contain venom and they prefer not to bite if at all possible. Finally some good news!
Number 1 Inland Taipan
When we say that the most venomous snake is endemic to semi-arid regions of central east Australia, it comes as no shock, right? Its venom, drop for drop, is by far the most toxic of any snake! Who would want to be anywhere near it, not us for sure! It is estimated that one bite possesses enough lethality to kill at least 100 fully grown men, and, depending on the nature of the bite, it has the potential to kill someone in as little as 30 to 45 minutes if left untreated.
7 MOST VENOMOUS SNAKES IN THE EARTH
7 MOST VENOMOUS SNAKES IN THE EARTH
Number 7 Russell’s Viper
For most poisonous snakes the percentage of dry bites is relatively high. But the Russell's Viper always goes for the maximum venom dose. A full grown Russell Viper, also called the chain vibrators India's deadliest snake considering for thousands of deaths each year. Those snakes are found throughout most of the world. But arguably the most venomous are the source caled vibrantly chain Viper found primarily in the center East and Central Asia particularly India China and South East Asia.
6 Tiger Snake
Found in Australia.The tiger snake is a very potent neurotoxic venom. Tiger snake is recognizable because of its width of yellow bands the bites are very accurate and without medicine will result in death nearly three-quarters of the time symptoms can include localized pain in the foot and neck region tingling numbness and sweating followed by a fairly rapid onset of breathing difficulties and paralysis.
5 king Cobra or Indian Cobra
King cobra is one of the largest venomous snake in the world and also one of the aggressive sneaking the plane. This snakes can run fast and bite quickly the another those venoms contain the neurotoxic. So if you get bites of this snakes, your body will be paralyzed and you can't take beating properly three to six hours without anti-venom your blood will be the dilemma and you will die.
4 Black Mamba
this snake is usually found in Africa they are identified to be highly aggressive and strike with deadly shortness. They are also the fastest land snake in the world able of approaching speeds of up to 20 km/h. A single bite holds efficient venom to kill then humans the black member will bite many of time when it attacks if the bite is not treated it is nearly always going to result in death
3 Eastern Brown Snake
If you want to know which snakes is most aggressive venomous sounds deadly combined Eastern brown snake is one of them you can found this deadly snake in Australia, Papua New Guinea and Indonesia this snake venom contains pre and postsynaptic neurotoxins which are bites this snake is fast-moving can be threatening under certain conditions and has been known to chase offenders and frequently strike at them
2 Inland Taipan
Inland Taipan is the most toxic venom of any land snake in the world you can commonly found in semi-arid regions of Central East Australia the highest yield reported for one single bite is 110 milligrams.
1 Belcher’s Sea Snake
According to various experts the belches see snake's venom is about a 100 times more toxic than any other snakes in the world are several milligrams is robust enough to kill 1000 humans less than one-quarter of bites will include venom and they are relatively docile the fisherman is normally the victims of these attacks as they encounter the species when they pick nets from the sea located in waters off South East Asia and northern Australia. The good thing is that this snake is considered to be very timid and would take a lot of provoking to get it to bite you
Number 7 Russell’s Viper
For most poisonous snakes the percentage of dry bites is relatively high. But the Russell's Viper always goes for the maximum venom dose. A full grown Russell Viper, also called the chain vibrators India's deadliest snake considering for thousands of deaths each year. Those snakes are found throughout most of the world. But arguably the most venomous are the source caled vibrantly chain Viper found primarily in the center East and Central Asia particularly India China and South East Asia.
6 Tiger Snake
Found in Australia.The tiger snake is a very potent neurotoxic venom. Tiger snake is recognizable because of its width of yellow bands the bites are very accurate and without medicine will result in death nearly three-quarters of the time symptoms can include localized pain in the foot and neck region tingling numbness and sweating followed by a fairly rapid onset of breathing difficulties and paralysis.
5 king Cobra or Indian Cobra
King cobra is one of the largest venomous snake in the world and also one of the aggressive sneaking the plane. This snakes can run fast and bite quickly the another those venoms contain the neurotoxic. So if you get bites of this snakes, your body will be paralyzed and you can't take beating properly three to six hours without anti-venom your blood will be the dilemma and you will die.
4 Black Mamba
this snake is usually found in Africa they are identified to be highly aggressive and strike with deadly shortness. They are also the fastest land snake in the world able of approaching speeds of up to 20 km/h. A single bite holds efficient venom to kill then humans the black member will bite many of time when it attacks if the bite is not treated it is nearly always going to result in death
3 Eastern Brown Snake
If you want to know which snakes is most aggressive venomous sounds deadly combined Eastern brown snake is one of them you can found this deadly snake in Australia, Papua New Guinea and Indonesia this snake venom contains pre and postsynaptic neurotoxins which are bites this snake is fast-moving can be threatening under certain conditions and has been known to chase offenders and frequently strike at them
2 Inland Taipan
Inland Taipan is the most toxic venom of any land snake in the world you can commonly found in semi-arid regions of Central East Australia the highest yield reported for one single bite is 110 milligrams.
1 Belcher’s Sea Snake
According to various experts the belches see snake's venom is about a 100 times more toxic than any other snakes in the world are several milligrams is robust enough to kill 1000 humans less than one-quarter of bites will include venom and they are relatively docile the fisherman is normally the victims of these attacks as they encounter the species when they pick nets from the sea located in waters off South East Asia and northern Australia. The good thing is that this snake is considered to be very timid and would take a lot of provoking to get it to bite you
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