10 Most Poisonous Spiders in the World

Poisonous spiders have a bad reputation and it is justly so. Some of these little terrorists may kill humans or cause them severe symptoms, varying from swelling of the area, to coma.  However, most of us are fascinated by these interesting creatures, especially the big, exotic types which look so alien but so beautiful in the same time! If you care to know more of their lethal potential, here is some information concerning the most venomous spiders in the world:

1. Brazilian Wandering Spider

brazilian wandering

This spider may be found (though I can’t imagine why someone would want to look for it!) in the tropical forests of South and Central America. The Brasilian wandering spider is not only the world’s most venomous spider -as ranked by Guinness World Records in 2010- but it is an aggressive one too. These combined features of toxicity and aggressivity allow us to name this spider the most dangerous  in the world. Its venom is so deathly that sometimes even the antivenin won’t work  and the most chances are that the victim will die.

2. Sydney Funnel Web

funnel web

The Sydney Funnel Web is not only one of the most poisonous spiders in the world, but one of the most dangerous as well. This is because it lives in populated areas, namely within 100 km from Sydney. This spider is also very aggressive and will definitely attack, if provoked, sometimes biting its victim multiple times. Its potent venom contains antracotoxin, which is particularly deathy for primates, thus  humans as well! What is more, the Funnel Web can often be found in swimming pools and trying to remove it from the water will definitely result in a bite. In 1980, an antivenin was created and since then, no deaths were recorded anymore.

3. The six-eyed sand spider

six eyed sand spider

This is a very poisonous spider also, but it is fortunately not as dangerous as the previous 2 because it lives in the isolated areas of the South African desert. It usually attacks by burying itself in the ground and ambushing its victim. The very dangerous venin it carries may be lethal to humans, as it creates a  necrotoxic  effect. This means that it causes blood leakage as well as tissue destruction. There is also no antivenin for this spider. However, none is probably needed since very few bites have ever been reported.

4. The Chilean Recluse Spider

chilean recluse spider

This spider is very well known for its toxicity. The most venomous of all recluses, its bite may easily result in the death of the victim. While the Chilean Recluse Spider is native in Chile (of course), it spread throughout the entire South America and reached such distant places as North America, Australia and Finland. Though reclusive, as the name suggests, and non-aggressive, they are dangerous because they may enter  houses, hide in beds or clothing and they may cause dermonecrotic lesions, as well as renal failure and death.

5. The Black Widow

black widow

This is one of the most renowned poisonous spiders in the world. The name of the spider comes from a bad habit of the female, that of eating its partner after having mated with it (sexual cannibalism). This vicious spider is also known for being highly poisonous and dangerous. The female of the species is equipped with extraordinarily big fangs, thus injects a larger quantity of venom. The black widow is common on the American continent and its bite may even lead to paralysis; deathy cases were also reported.

6. Redback Spider

redback spider

A cousin of the Black Widow, the Redback spider lives in Australia, where it is considered one of the most dangerous species of spiders.  The bite, though rarely lethal, especially since the commercialization of an antivenin, is very painful and may produce extremely unpleasant symptoms such as swollen limph nodes, fever, nausea, headaches, hypertension and rarely coma or pulmonary edema.  The pain may last 24 hours, which is enough to make us run as far as we can when seeing it.

7. The Mouse Spider

mouse spider

The Mouse Spider is another of the dangerous spiders  endemic to the continent Down Under. Closely related to the Sidney Funnel Web , this spider is also capable to kill humans. However, it did not do so up to this moment and this is mainly because it has a custom of giving so called ‘dry bites’, in the course of which the spider does not release venom. If poisonous bites do occur, you should know that the symptoms are close to the ones given by the venom of the Sydney Funnel Web and the same antivenin is efficient in both cases.

8. The Fringed Ornamental Tarantula

fringed ornamental tarantula

Native in Sri Lanka and often kept as a pet, this tarantula is really poisonous as well. While all tarantulas have impressive fangs to scare us with, most of them are not dangerous and give their victims nothing more than a bite similar to a wasp sting. However, the venom of the Fringed Ornamental Tarantula is much worse being capable to induce coma and to cause intense pain . This unfriendly spider does not warn before attacking and does not hesitate, which makes it very dangerous, especially since it is seen as a great display pet.

9. The Chinese Bird Spider

cinese bird spider

The Chinese Bird Spider has a colorful name, an impressive size and a painful bite, as well. One of the most dangerous tarantulas out there, together with the previously mentioned Fringed Ornamental Tarantula, it is endemic in Southeast Asia, in the rainforests of China as well as in Vietnam. Even though it is also kept as pet, it is very aggressive and will attack with no hesitation, if disturbed. While there is no full documentation on its venom’s potency, very small doses are enough to kill little animals, so this is one spider you should not play with!

10. Yellow Sac Spider

yellow sac spider

Also known as the Black Foot Spiders, they may seem really pretty but these yellow spiders are on this list of most dangerous spiders for a good reason! They may be encountered in many places of the world and are known to cause painful lesions. Though not , its deathly venom is of a necrotic nature, which makes it capable of provoking a MRSA (a bacterium) infections.

photo credits:

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  1. Helena says

    A bit from one of those spiders and you are gone… i think we should be very careful when spending outdoor time

  2. Georgy says

    They look spooky. I do not like spiders, I am very scared of them. After reading this article I hate them even more…

  3. Dya says

    I think I just got spider phobia! Seriously! They look so creepy! I will surely be much more careful when I go on trips.

  4. Adrianne says

    I now wish I hadn’t read this article. So many spiders…that look so gross! I never imagined spiders could be so deadly.

  5. guest says

    The black widow isn’t actually very deadly. You’re chances of dying from a black widow bite are 5%. It just makes you feel sick and pain(depending on the age and health of the person bitten) You actually have more of a chance of getting in a car crash then being killed by the black widow. A kid in my science teachers class got bit and she just felt sick.

  6. AussieMarty says

    Umm, “Sidney” is actually spelt SYDNEY. It is the SYDNEY Funnel Web! Could someone possibly correct this typo?

  7. Crippsy says

    Spiders don’t phase me much I have seen 100s of red backs and all kinds of other spiders .. But if there is a snake near me ill freeze up and pass out I hate them !!!

  8. Asshole Spider Guy says

    I find it hard to take an article serious when they can’t even be bothered to use proper spelling and grammar. While I will agree that most of your information is technically factual, if a bit colored, I would suggest that you at least attempt to sound like you know what your talking about.

  9. Those little things says

    I have trouble comprehending how a well adjusted adult would be scared of any pissy little spider. Seriously, grow up! Are you scared of getting the bottom of your shoe dirty, just step on them, sheesh. What would you do if you had a sleeping baby and one of these crawled onto its face? After you finished changing your jocks I’m betting most of you would spray it with insect spray. No spider is deadlier than my boot, or yours. Get over it and grow up.

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