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The Worlds Most Venomous and Deadly Snakes

Updated on December 12, 2015
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Anna studied psychology, law, English and animal welfare in college. She is a mother of two and a 2019 bride!

A Black Mamba

Before I begin, I would like to acknowledge the fact that the world's most venomous snakes may not necessarily be the most fierce or the most dangerous, in fact, most (but not all) of the most venomous snakes are extremely shy. Snake venom is measured using the "LD50", which stands for "Lethal Dose 50%", and taking this into account the world's most venomous snakes are as follows.


Western Brown

The Western Brown Snake. Although it is last on this list, it is one of the highest on the lists of snake-bite fatalities. Out of 38 snake-bite deaths that are moderately recent in Australia, 22 are suspected to be due to the Western Brown. Remember that's over 50% which is extreme when you consider how many vicious snakes there are in Australia - or how many snakes there are that have the ability to kill people. This is just one sub-type of a very large species of snake, and it is one that is known well for its incredible speed and vicious bite. Instead of biting and then trying to get away, as most snakes will do, this snake will sometimes bite repeatedly, and this is thought to be why, although it is not as venomous as other snakes on this list, it is one of the most efficient and common snake-killers of humans. Western Brown's will grow up to six feet in length and one single bite has enough venom to kill 100,000 mice.


Death Adder

The Death Adder is an elapid whose venom is hemotoxic and causes paralysis in the whole body. It may not be the world's most venomous snake - but its bite is incredibly vicious and the effects are obviously very frightening. Although, like most of Australia's venomous snakes, it feeds on small mammals, it can easily kill a human with one bite, and will usually inject venom when it bites, unlike some snakes. Death Adder's, as their name suggests, kill many humans every year, usually being disturbed while humans are out hiking in the Australian Bush, far away from any hospitals.


Giant Black Tiger Snake

The Giant Black Tiger Snake is closely related with all other types of tiger snake and has similar venom which will easily kill a human - and quickly. Known as a giant due to its massive size - often reaching 1.9 meters and sometimes exceeding that length, which is highly unusual for Tiger Snakes, which usually grow to no more than six feet. What is so unnerving about this snake is that when it strikes, it will not miss. Although it will usually try to get away from humans as it is a shy creature by nature, some will, if angered and disturbed to a certain degree, flatten their bodies, make loud hisses and then raise their heads of the ground in the classic pre-strike pose. If you do not jump back when this snake is doing this you will always be bitten, usually more than twice, as it is known for repeatedly biting in fury and fear of you. They are very commonly found and very dangerous when cornered and unable to flee, and so you should never get yourself into this position as it is likely that it will inject you with venom, even though some of the strikes may be bluffs.


Western Tiger Snake

The western tiger snake can grow up to six feet in length and, like many other tiger snakes, this species is notoriously aggressive. This snake's bite is particularly scary due to the venom's physical effect on humans and other animals - western tiger snake venom has a hemotoxic effect - clotting people's blood in their arteries, leading to death.

Its venom is highly neurotoxic and will almost certainly kill you if injected - symptoms of a western tiger snake bite include:

  • Kidney failure
  • Loss of muscle control
  • Respiratory failure
  • Paralysis
  • Coagulopathy (bleeding disorder)
  • Myolysis (muscle damage)

At least 1 death every year is known to be due to a tiger snake bite - they are very aggressive, dangerous snakes whose venom is amongst the most potent of all snakes.


Beaked Sea Snake

The Beaked Sea Snake is known for its incredible manoeuvres under-water, but it does not live solely in the sea. Sea snakes will often come and sun themselves on beaches and pose a massive threat to dogs, children and people who aren't sensible enough to stay away. They are incredibly venomous, but they normally only grow to about three foot in length, and so people under-estimate the threat that they are. They are known as "beakes" sea snakes due to the curved appearance of their snout, which helps them to hold on to eels and fish which make up their main diet.

Eastern Tiger Snake

The Eastern Tiger Snake is found in South-East Australia and held the world record for the most snake-bite fatalities in Australia, until recently, when the Eastern Brown Snake over-took it. This snake, as suggested by the latter information, is a lot more aggressive than the above three snakes and has been known to bite often when disturbed. Fortunately, it is fairly easy to spot as it's orange and black "tiger stripes" give it away. They are not nocturnal creatures, although if nights are very, very hot they may wander around in search of lizards or rats, they also are usually only found in swamps, and this means they are not easy to stumble into - they aren't likely to spring at you from a shrub in your garden. They are around two feet smaller than most tiger snakes - they usually reach 4 feet maximum size, although their size shouldn't mean that they are put down in terms of venom. Quite simply, they will kill you if you are bitten.


Coastal Taipin Snake

The Coastal Taipin snake, which is closely related to the world's most venomous snake, The Inland Taipin. This snake can grow up to 3 meters long, and is generally a light brown colour. Fortunately, these snakes are in no way aggressive and will not attack or bite humans unless alarmed, afraid or attacked themselves. These snakes are also found in Australia - though they are not as widely spread as the Inland Taipin, the Coastal Taipin, as its name suggests only lives along the coast of Australia.

The Mulga

The Mulga or "King Brown" Snake, which is widely distributed around Australia can grow up to 2 meters long, and, like the Inland Taipin, feeds on frogs and small animals such as rats and mice (not humans!). The average tiger snake will deliver 10-20mg of venom when milked, whereas a Mulga snake can deliver up to 150mg of venom in just one bite! Although this snakes venom can be fatal (and normally is), there are some circumstances where anti-venom can be administered, which can save the lives of those who have been bitten, although this depends on time and the amount of venom in the bite. This snake does not always inject venom if it bites, although this is not a point to rely upon as if it does inject it's venom into you, you will definitely die unless you immediately injected the anti-venom. Even then, you are unlikely to survive without complications. In one case of a man being bitten (through his own stupidity), his arm had to be amputated and he slipped in to a coma after being bitten several times by this particular snake, which he had tried to capture.

Inland Taipin

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Worlds Most Deadly Snake

The Inland Taipin Snake. Indisputably, this is the world's deadliest snake. Experts and specialists found that the venom in one single bite from this snake can kill one hundred six foot tall humans, and the snake may strike several times. Found in Central Australia, the Inland Taipin snake has earned the nick-name "The Fierce Snake" due to it possessing the deadliest venom out of all snakes ever found and the fact that its venom will make you feel excruciating pain through-out your body if you are bitten. It's venom is 50 times more deadly than that of the Indian Cobra, which is another extremely venomous snake. It is said that this snake's venom will kill a human in a matter of seconds.


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