The 14 most poisonous and dangerous spiders in the world - Medicine - 2023 (2023)

The 14 most poisonous and dangerous spiders in the world - Medicine - 2023 (1)

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  • What are the Deadliest Spiders?
  • 14. Goliath-Vogelspinne
  • 13. Yellow sac spider
  • 12. Ornamental tarantula
  • 11. Spinnenwolf
  • 10. Chinese tarantula
  • 9. Spinnenratte
  • 8. Chilean recluse spider
  • 7. Red Spider
  • 6. Wandering Spider
  • 5. Black Widow
  • 4. Funnel web spider
  • 3. Brown recluse spider
  • 2. Six-eyed sand spider
  • 1. Brazilian Wandering Spider

The 14 most poisonous and dangerous spiders in the world - Medicine - 2023 (2)

Arachnophobia is undoubtedly the most common phobia in the world. In fact, you believe that33% of people who have a phobia are for spiders. And when you consider that 1 in 23 people has a phobia, we're talking about hundreds of millions of people who have a profound dislike for these creatures.

Spiders are the largest order within the Arachnid class (like scorpions, ticks, or mites) and certainly have an appearance that, shall we say, doesn't invite too many cuddles. In fact, it's literally the last thing we want to do when we see a spider. Although for tastes, colors.

Be that as it may, arachnophobia is, by definition, an irrational fear. And it is one of the more than 47,000 known species of spiders,only 175 are dangerousfor the people. That is 0.03% of all species.

Well, those that are aren't because they have poison, but because some can kill us. In today's article, we travel the world to find the most dangerous species of spiders.

  • We advise you to read: "The 25 Most Venomous Snakes There Are"

What are the Deadliest Spiders?

Despite their bad reputation and our slippers' fury when they enter the house, spiders are far from our biggest threat. In fact, all over the worldonly kills 50 people. That's nothing compared to the 130,000 deaths caused by snakes or 750,000 by mosquitoes (including 600,000 from malaria, a parasitic disease transmitted through bites).

While there are very venomous spiders that are life threatening, they only inject the venom when they feel very threatened. Let's see which spiders are more poisonous. We try to rank them from least to most dangerous.


  • We advise you to read: "30 animal myths debunked by science"

14. Goliath-Vogelspinne

The Goliath tarantula does not bear this name by accident. ANDthe biggest spider in the world(Adults can measure up to 30 centimeters) and while one is unrelated, it's also one of the most dangerous.

Found in the tropical jungles of South America, the Goliath tarantula is venomous and deadly to birds and animals of similar size. In any case, it should be remembered that its poison is not fatal to humans under any circumstances. The bite and the toxins naturally create a deep wound, which is accompanied by a lot of pain, nausea, sweating, burning and irritation for several days. It doesn't kill, but be careful with it because if it feels threatened, it will be aggressive.

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13. Yellow sac spider

Native to North America, the yellow spider is one of the most dangerous spiders in the world. Although its bite is not fatal, it can seriously injure skin. And it is that its poison of a cytotoxic nature kills the tissue cells near the bite, causing its necrosis.

Regardless, its diet is based on other insects and even spiders, which can be larger than them. Whatever the case, problems arise because they have an inclination, although they can live, grow and reproduce outdoors.inside the houses.

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12. Ornamental tarantula

Found in western and eastern parts of India, the ornamental tarantula is another of the most dangerous spiders. Although not as large as the Goliath, they can reach 25 centimeters. There are hundreds of different species, although all have a potent toxin that will not kill if bitten, but in some cases willthe coma.

The ornamental tarantula is characterized by the fact that it does not catch its prey (flying insects) with the help of webs, but throws itself on them. It is one of the few spiders that it actively hunts.

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11. Spinnenwolf

The wolf spider, so named for its aggressive behavior when hunting, is one of the most dangerous spiders in the world. In any case, it usually runs away from large animals (including us, of course) and its bite is not fatal, but it can causepotentially serious infections.

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10. Chinese tarantula

The Chinese tarantula, as the name suggests, inhabits the rainforests of China and Vietnam. Despite its name, this spider does not eat birds, but insects and small rodents.

It is not fatal (when treated), but its potent neurotoxins have caused episodes of severe nerve damage and even in some casesphysical and mental disabilityafter the bite.

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9. Spinnenratte

Native to Australia and New Zealand, the mouse spider is one of the most dangerous spiders in the world. It measures less than 4 centimeters, but be careful with that. have one ofmost interesting hunting methodsof the animal world, as it forms burrows with a kind of "cover" and opens it when motion is detected and catches its prey.

The bite in humans, while not fatal, is extremely painful and is usually accompanied by involuntary muscle contractions, sweating, tingling in the mouth, numbness, nausea, vomiting, etc.

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8. Chilean recluse spider

Found in Chile, Argentina, Peru, Ecuador, Uruguay, and southern Brazil, the Chilean recluse spider is one of the most venomous in the world, measuring just over 2 centimeters (0.8 in) long. Its cytotoxic venom causes necrosis (cell death) of tissues in the vicinity of the bite and causeslife-threatening gangrene.

It has been observed that this spider can even cause kidney failure, that is, it can seriously damage the kidneys. Despite treatment, it can sometimes lead to death.

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7. Red Spider

Originally from Australia, this tiny spider (just over 40 millimeters long), believed to be a close relative of the famous black widow (which we'll see later), has a very potent venom that varies in each individual works strong. , which is still under investigation.

In milder cases, spider bites are accompanied by swollen lymph nodes, nausea, and headaches severe enough to resemble migraine attacks. But the most severe cases may be accompanied by seizures,Apnea, eat and even death.

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6. Wandering Spider

The hobo spider, also known as the hobo spider, is a very small spider (maximum 15 millimeters) that inhabits various regions of Europe, Asia, the United States, Canada, and southern Alaska. Its bite is very dangerous because the toxin, while not generally fatal, causes necrosis of nearby tissues in addition to causing severe headaches and is left behindvery ugly scarsfor the rest of your life. Although not deadly, its necrotic effects and wide variety of habitats make it one of the most dangerous in the world.

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5. Black Widow

Probably the most famous on this list. Native to North America, the black widow, which gets its obscure name in the media because the females eat the males after mating to ensure good husbandry, is one of the most venomous spiders in the world.

But its effects on humans are still terrible, since an untreated bite (there is an antidote) of this spider causes neurotoxic effects, leading to muscle spasms and even muscle spasmscerebral palsy. It is not usually fatal but can kill children and the elderly.

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4. Funnel web spider

Also known as the Sydney spider (it's from Australia), the funnel-web spider is one of the most venomous spiders in the world. She is characterized by being one of the spiders that injects the highest dose of venom with each bite (she is very aggressive and stings repeatedly), which makes her extremely dangerous, especially for children and the elderly.

It is so toxic that its neurotoxic (nervous system attack) toxin can cause death in children from generalized muscle paralysis.in just 15 minutes. In adults, although not usually fatal, it causes an extremely painful sore accompanied by nausea, vomiting, muscle spasms, and general fatigue.

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3. Brown recluse spider

The brown recluse spider, also known as the corner spider or fiddler spider, is one of the most venomous and dangerous spiders in the world. And it's that not only is it a powerful poison, but it also has a penchant for inhabiting the dark areas of houses, like the corners behind furniture or the part behind pictures.

In addition, its venom expands very quickly after being stung, which can lead to thisdeath in an hour. All of this puts him in third place.

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2. Six-eyed sand spider

The six-eyed sand spider has the "honor" of being the second most venomous spider in the world. Native to South Asia and African deserts, this terrifying creature, despite its potent venom, is not aggressive unless seriously threatened.

  • We advise you to read: "The 6 Most Amazing Animals of the Desert"

Remember that there is no antidote, so extra care should be taken. These spiders camouflage themselves in the sand (hence the name) and wait for their prey to come by. However, we can unknowingly make it feel threatened (you hardly realize how well camouflaged it is) and then it may bite us.

Aside from the fact that there is no antidote, its symptoms are certainly therethe most terriblefrom this list. In addition to necrosis, the bite of the six-eyed sand spider can also cause internal and external bleeding. And it is that its toxin induces blood clotting, which causes blood clots to form, which can lead to death.

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1. Brazilian Wandering Spider

Few spiders can claim to be worthy of a Guinness Record. But the Brazilian wandering spider, as it bears the title, can"The most venomous spider in the world". Also known as the banana spider, it is native to Brazil and other countries in South America.

Its neurotoxin is so potent and such an amount injected (more than any other for its size) that it quickly suffocates and consequently leads to death. They are also very aggressive and easily recognizable because they raise their front paws when they feel threatened.

As a shocking fact, it should be noted that in men, the neurotoxin triggerspainful erections(In fact, its venom is being studied as a possible treatment for erectile dysfunction.) In 2013, a family in London had to go outside and fumigate it because they bought a bag of bananas from Brazil and, when they opened it, hundreds of bananas fell on these spiders, what was not found in any of the production batches. or transport.

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