Are You Afraid Of Spiders? These 10 Species Must Be Avoided At Any Cost


cobalt blue tarantula

Spiders (order Araneae) are air-breathing arthropods that have eight legs and chelicerae with fangs that inject venom. They are the largest order of arachnids and rank seventh in total species diversity among all other orders of organisms. Spiders are found worldwide on every continent except for Antarctica, and have become established in nearly every habitat with the exceptions of air and sea colonization.
(Source: Wikipedia)

There are about 40,000 types of spiders in the world. And they’re not newbies: fossilized spiders have been found in Carboniferous rocks dating back 318 million years.
(Source: Live Science)

Among all these species, this list will reveal you the top 10 most dangerous spiders in the world. 10 types of spiders you must know and avoid at any cost. If you encounter even one of these ten spiders, your life will seriously get in trouble. Since we would like to prevent any sort of death, we would like to tell you, today, what are the 10 most dangerous spiders living on this planet.

10. Chinese Bird Tarantula.

chinese bird tarantula

Venomous spiders capable of delivering a rather dangerous bite. Their LD50-value is low and in the same range as many loxosceles species (brown recluse spiders). Know more on

9. Wolf spider.

wolf spider

The bite of the Wolf Spider is poisonous but not lethal. Although non-aggressive, it bites freely if provoked and should be considered dangerous to humans. The bite may be very painful. First aid and medical attention should be sought as soon as possible, particularly as to children or the elderly. Know more on

8. Yellow Sac Spider.

yellow sac spider

Also known as Cheiracanthium inclusum, it is a small spider with a body length of about ¼ inch for both males and females. Its bites are relatively painless, but do cause bite symptoms that include lots of pain at first and the subsequent develop of other symptoms such as redness of the skin, swelling and itchiness. Some bites may cause systemic reactions with fever, malaise, muscle cramps, and nausea. A necrotic lesion and ulceration may also occur at the site of the bite, but this condition is extremely rare. In general, yellow sac spider bites may be initially painful but rarely result in any serious medical conditions. You can read more on the Orkin website.

7. Fringed Ornamental Tarantula.

fringed ornamental tarantula

Poecilotheria ornata, or the Fringed ornamental, is a large arboreal tarantula. Its leg span sometimes reaches 10 inches (25 cm), and is probably the largest of the genus. This species is considered to have a medically significant bite, with venom that may cause intense pain, and extreme muscle cramping judging from the experience of keepers bitten by this species. Discover more on Wikipedia.

6. Six-Eyed Sand Spider (Sicarius).

six-eyed sand spider sicarius

Medium-sized spider found in deserts and other sandy places in southern Africa. The venom of this spider bite is said to be the most dangerous on record. Over 38,000 species of Six Eyed Sand Spider have been identified, however, because of their great ability for hiding, it is believed that about 200,000 species exist. Further info on

5. Brown and Chilean Recluse Spider.

brown and chilean recluse spider

Itìs well-known for its appearance and poisonous bite. Found only in the south and central United States, if it bites you should seek immediate emergency medical help, according to the National Institutes of Health. Note: like most spiders, the brown recluse typically only bites when disturbed. You can have a deeper knowledge on Live Science website.

4. Latrodectus (Widow Spider).

latrodectus widow spider

It’s venomous and can be harmful to people. Its bites occur most frequently when the spider is trapped against human skin, either by reaching under objects where the spider is hiding or when putting on clothing, gloves or shoes containing the spider. Widow spiders are generally very timid and only bite in self-defense when they accidentally contact humans. The bite from the widow spider causes a set of symptoms in the bite victim known collectively as latrodectism. Latrodectism is caused by the neurotoxic venom injected by the widow. For a complete description of this spider visit the Bugguide website (hosted by Iowa State University – Department of Entomology).

3. Mouse Spider.

mause spider
Peripitus / Wikipedia

You can find it widely distributed across the Australia mainland, under eight species. Some mouse spiders have a very toxic venom which is potentially as dangerous as that of the Sydney Funnel-web Spider (read next position). However, few cases of serious envenomation have been reported, the most serious resulting from the bite of a male Eastern Mouse Spider, Missulena bradleyi near Brisbane. To learn everything about this spider read this report by the Australian Museum.

2. Sydney Funnel-web Spider.

sydney funnel web spider
Australian Reptile Park

Considered the most dangerous in Australia, it is a large, bulky spider, with females reaching over 35mm in body length and males around 25mm. Although responsible for many less bites than the also notorious redback spider, the Sydney Funnel-web Spider is potentially lethal and has a stronger venom which it is much more capable of delivering. It also has a well earned reputation of being one of the most aggressive spiders you’ll come across. If you would like a deeper understanding you can visit the Planet Deadly website.

1. Brazilian Wandering Spider.

brazilian wandering spider
Steve Downer

Also called armed spider or banana spider, it belongs to the genus Phoneutria, which means “murderess” in Greek. Its bite can be deadly to humans, especially children, although antivenin makes death unlikely. The Guinness Book of World Records named it the world’s most venomous spider in multiple years. You can find more info again on the Live Science website.

 Watch this useful and interesting video.


Are you afraid of spiders now? Where do you live? Do you know about any dangerous species populating your area? Anyway, we do hope you are safe and in good health.

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