10 Most Poisonous Spiders in the World

sp[iderSpiders are amazing but dangerous creatures. They come in all shapes and sizes and some aren’t as dangerous as others. While not all spiders are venomous, the more deadly species are capable of causing fatal damage to people if they should be bitten.  Here at Tony Hakim Animal Lovers, we like to keep you informed, so here is the list of top 10 most poisonous spiders in the world.

Yellow Sac Spider

These small spiders are pale in colour and usually range from about 5-10 mm in length. Despite its level of toxicity being disputed, the bite of these spiders can cause MRSA infections and their venom is said to contain necrotic properties.

Fringed Ornamental Tarantula

Growing up to an astonishing 18 centimetres, these spiders are definitely something you don’t want to mess with. Characterised by the same hairy body, massive size and huge fangs of other tarantulas, the only trait this spider doesn’t share with them is the intensity of its venom.

Chinese Bird Spider

If you thought the last spider was bad, you definitely wouldn’t want to meet the Chinese Bird Spider. Typically found throughout China and Vietnam, the beasties grow even larger, up to 20 cms! They are quite aggressive and are easily able to bring down small mammals with their venom.

Mouse Spider

The first of what are to be a few Australian entries on this list, this relative to the infamous Funnel Web may have a cute name, but in reality is anything but. Its venom levels are high enough to easily kill a human being, but due to its propensity to give ‘dry bites’ there have been no reported deaths by this spider.

Chilean Recluse Spider

This is another spider with necrotic venom.  The venom from the Chilean Recluse Spider itself isn’t the most likely thing to kill you; it would have to be the necrosis caused by its venom. Necrosis is where the very tissue dies, leaving it well open for infection, even to the point of becoming gangrenous. Thankfully, this spider takes after its name and is rarely encountered.

Redback Spider

Another Aussie and this one has a reputation as nasty as its bite. A part of the Widow family of spiders, Redback venom contains a neurotoxin that has active effects on humans. Typical symptoms from this include headaches, nausea and tremors. While rarer, more severe reactions are seizures, respiratory failure and even death.

Black Widow Spider

This is another quite well known species. Aside from its rather dubious mating practices, the venom of the Black Widow is also quite noteworthy. It can cause Latrodectism, a condition which results in severe muscle spasms and even temporary spinal or cerebral paralysis.

Sydney Funnel Web

Funnel Webs are well known for their venom and rightly so, they are among the most dangerous spiders in the world and also one of the most aggressive. Their venom contains a compound called atracotoxin which is very dangerous to primates and people.

Six Eyed Sand Spider

One of the most venomous spiders in the world is also luckily one of the least encountered. Found in the desert and arid areas of southern Africa, this spider is not known to be especially aggressive. Which is just as well because its bite can cause disseminated intravascular coagulation (DIC), which results in clots throughout the skin as well as bleeding from the skin and orifices.

Brazilian Wandering Spider

Named the most venomous spider in the world by the Guinness Book of World Records, if there is one spider you never want to meet, it is this one. Its venom can cause priapism in men, leading to impotence, as well as causing asphyxiation. Death in humans has been known to occur even after antivenom has been administered.






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