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Most Venomous Spiders In The World - Most Posionous Spiders In The World

Updated on October 1, 2014
Yellow Sac Spider
Yellow Sac Spider

Watch a Yellow Sac Spider

# 10 Yellow Sac Spiders

The Yellow Sac Spider is located in North America and grows to lengths of .25 - .5 inches in length. This species of spider ranges in color from yellow to beige. This spider is known to be attracted to gasoline and has been known to spin webs inside of vehicles gas tanks and engines.

This spider can often be found living in homes, sheds, under logs, and thick leaves. The spider's bite usually causes the skin around the bite to die and acts similar to a MRSA infection.

Red areas represent location of yellow sac spiders.
Red areas represent location of yellow sac spiders.
Fringed Ornamental Tarantula
Fringed Ornamental Tarantula
Fringed Ornamental Tarantula
Fringed Ornamental Tarantula

Watch a Fringed Ornamental Tarantula

# 9 Fringed Ornamental Tarantula

The Fringed Ornamental Tarantula is a member of the tarantula family reaching lengths of 25 cm long. This spider is usually found in Southeastern India. This species of spider spins thick webs in holes inside of logs, dead trees , or tree holes.

If an adult is bitten by one of these spiders they will experience extreme pain and paralysis. There is not a lot known about the Fringed Ornamental Tarantula.

Chinese Bird Spider
Chinese Bird Spider
Chinese Bird Spider
Chinese Bird Spider

Watch a Chinese Bird Spider

# 8 Chinese Bird Spider

The Chinese Bird Spider is a part of the tarantula family. This species of tarantula is found in China and Vietnam. The Chinese Bird Spider can have the leg span of 35 inches long! The spider prefers to live in tropical habitats.

The Chinese Bird Spider has been known to be aggressive towards humans if disturbed. The spider often burrows deep below the ground and pops out grabbing its food. The spider usually preys on cockroaches, crickets, and mice.

There have been instances in which the spider has bitten a child and rendered the child unable to move after being bitten due to the severe nerve damage that occurred from the spider's venom.

Mouse Spider
Mouse Spider
Mouse Spider
Mouse Spider

Watch a Mouse Spider

# 7 Mouse Spider

The Mouse Spider can be found in Australia. The Mouse Spider is a medium to large sized species, reaching lengths of 1 to 1.4 inches in length. The spider's body looks glossy and shiny and they are usually entirely black. Sometimes the spider may have a blue patch on its back.

The Mouse Spider lives in burrows with a trapdoor. The females generally stay in their burrows, while the male wanders outside the burrow.

Chilean Recluse Spider
Chilean Recluse Spider

Chilean Recluse Spider

# 6 Chilean Recluse

The Chilean Recluse Spider is the most dangerous of the recluse spiders. This species of spider is a larger spider and can reach lengths of 40mm long. The spider is usually brown with a marking coming from its head to its thorax creating a violin like symbol.

The Chilean Recluse spider is found in South America, but is most common in Chile. This species of spider has migrated as far north as Los Angeles. The Chilean Recluse spider is more active at night and builds its web in wood piles, sheds, closets, garages, and other undisturbed places. The Chilean Recluse spider is usually accidentally disturbed by humans, because the spider often hides in shoes, under blankets, or on clothing on the floor. This is when the spider usually bites.

When the spider bites it usually creates an ulcer like bite, and destroys the skin around the bite. The bite can take months to heal and has been known to kill a few humans in South America who did not receive anit-venom in time.

Redback Spider
Redback Spider

Watch the Redback Spider

# 5 Redback Spider

The Redback is native to Australia. The female Redback Spider is easily identified by a red stripe on the upper side of its abdomen and an hourglass or streak on the underside. Females are larger than the male species, with their bodies reaching lengths of .4 inches.

The spider usually lives in a warm place, in a messy web. This specie is usually found near human homes and communities. The spider waits in its web until an insect gets caught in its web and then the spider injects venom into its prey.

The spiders' choice of residence means it often encounters humans and has been responsible for many of the spider bites in Australia. When a human is bitten, a great deal of pain is felt at the source of the bite and then continues up the limb, followed by intense sweating, vomiting, headache, and nausea. However, an anti-venom has been developed and since its development in 1956 there have been no known deaths from a Redback spider.

Watch a Black Widow Spider

# 4 Black Widow

Black Widow spiders are located in North America. They are easily identified by a red or reddish orange hourglass like shape on its abdomen. Sometimes the red hourglass can be divided in the middle and split into two. Also, the red hourglass may be missing completely and be replaced by spots.

The female is known to sometimes eat its mate after reproducing, hence the name "Black Widow." The female Black Widow is larger than the male and its venom is three times stronger than the male's venom.

Yellow area represents where Black Widow Spiders can be found.
Yellow area represents where Black Widow Spiders can be found.
Sydney Funnel Web Spider
Sydney Funnel Web Spider

Watch the Sydney Funnel Web Spider

# 3 Sydney Funnel Web Spider

The Sydney Funnel Web Spider is usually found within a 62 mile radius of the city of Sydney, hence the name "Sydney Funnel Web Spider." The spider varies in size from 1 to 5 cm in body length. This species of spider is usually dark in color, either black or brown.

The Sydney Funnel Web Spider prefers moist clay or sand areas. The spider builds a silk tunnel or funnel leading to its safe spot under a log, rock, or in the hallow of a tree. The spider preys on insects, lizards, or frogs. The spiders create a trip line outside the entrance of its tunnel and when the wire is tripped the spider rushes out to pounce on its prey.

Children are at particular risk of receiving deadly bites from this spider. The spider's venom begins acting within an hour of the bite. There is one report of a child in Sydney dying from the bite of a Sydney Funnel Web Spider in less than 15 minutes after the bite was inflicted. Anti-venom is available.

Six Eyed Sand Spider
Six Eyed Sand Spider

# 2 Six Eyed Sand Spider

The Six Eyed Sand Spider is a medium sized spider with a leg span up to 50mm and its body measuring as long as 15mm. This species of spider is most often found in the deserts and sandy areas of South Africa. Humans do not encounter this spider very often and there are only two unproven reports of a bite from this species of spider but the true identify of the spider bite has not been identified. However, experiments have shown that the venom from the spider can kill rabbits in 5 to 12 hours.

The spider hunts in an ambush style by burying itself in the sand and waiting for its prey to cross its path. The spider than ambushes its prey. The spider is highly adapted to its environment, it can live a year without a meal or a single drop of water.

Brazilian Wandering Spider in its defense position
Brazilian Wandering Spider in its defense position

Watch A Brazilian Wandering Spider

#1 Brazilian Wandering Spider

This is the most venomous spider in the world. It is highly aggressive and when disturbed will bite furiously and multiple times. When this spider feels threatened it will rear up on its back legs in preparation to fight.

The Brazilian Wandering Spider is found in tropical South American and Central America. The spider's leg span grow as large as 6 inches in length, and the spider's body can be as long as 2 inches long. The best way to identify the Brazilian Wandering Spider is by it's defensive pose of rearing up on its back legs.

The reason the spiders are called "wandering" spiders are due to the spider's behavior at night. Instead of retreating into a web or its domain at night, this spider "wanders" the jungle floor looking for its prey. During the day this species of spider remains mostly hidden under logs, rocks, dead trees, and even in termite mounds.

The spider's venom is a deadly neurotoxin that can cause loss of muscle control, intense pain, respiratory difficulties, which then turns into paralysis and eventually asphyxiation. Without the anti-venom that has been developed a hand full of people would die yearly. The individuals most at risk are children younger than seven and the elderly. The spider has an increased chance of encountering humans due to it "wandering" nature. The spider will often hide in cars, homes, under clothes, in closets, shoes, boxes, etc... during the day and an individual may unknowingly cross the spider's path and fall victim to it's bite.

The Brazilian Wandering Spider's main food sources are usually mice, katydids, crickets, and possibly tree frogs or lizards.

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