1. Brazilian roaming spider
The Brazilian roaming spider Phoneutria nigriventer, also known as the banana spider, is a large spider found in Brazil and other places in South America. The Brazilian roaming spider is a highly venomous and very deadly spider. One of the deadliest spiders in the world, its virulence is second only to the Sydney funnel web spider. They can release a powerful "neurotoxin" that can lead to nerve loss, difficulty breathing, and severe pain. Its 10 mm venom gland secreted enough venom to kill 225 mice. If a person is bitten by it, there will be symptoms such as arrhythmia, increased blood pressure, vomiting, etc., and if it is not treated in time, it will lead to death, and since 1926, 14 people have been poisoned and died. In 2007, guinness world records awarded the Brazilian roaming spider the title of "most poisonous spider".
2. Six-eyed sand spider
The Six-Eyed Sand Spider is a medium-sized spider with a body length of about 8 to 15 mm and a leg length of up to 50 mm, living in the desert of South Africa, and similar species of its genus have been found in Africa and South America. And the genus name of the six-eyed sand spider has the Latin meaning of murderer. Its bites have been confirmed in experiments, and rabbits can be fatal in 5 to 12 hours. Compared with other members of the spider family, the six-eyed sand spider is very special, it does not track prey, does not weave webs, and it is one of the most venomous spiders in the world, even if magnified to the entire animal kingdom, its toxicity can still rank among the best In addition, the venom of the six-eyed sand spider is one of the deadliest venoms in the world. Toxicological studies have shown that its venom has a powerful role in hemolysis, which can cause extremely serious damage to humans, and the symptoms of poisoning will slowly appear, first of all, there will be pain near the wound, and then tissue necrosis will cause dysfunction, and the venom will lead to rupture of blood vessels and lead to organ failure after entering the blood circulation system. There is no antitoxin available until 2018, so the consequence of stinging will be amputation or death. Fortunately, the six-eyed sand spider will actively avoid humans, and there is only one case of humans being stung by the six-eyed sand spider. The endurance of the six-eyed sand spider is also amazing, even if it does not eat or drink, it can survive for a year.
3. Sydney funnel web spider
Compared to other spiders, the Sydney Funnel Web Spider is very large, with a body length of 6 to 8 cm. Male Sydney funnel web spiders are lighter than female Sydney funnel web spiders. Native to the east coast of Australia, the Sydney funnel web spider is arguably the most aggressive spider in the world, killing an adult in less than an hour with a single bite. The effects of the super venom can be felt within minutes of the bite, and the venom of the funnel web spider can spread rapidly, creating spasmodic paralysis. Patients will have muscle spasms, sometimes extremely intense, and eventually fall into a coma. Toxins can invade the respiratory center and patients will eventually suffocate to death. For decades, Australians' fear of this highly venomous spider has remained undiminished. Sydney Funnel Web Spider Venom is the most toxic of all spiders in the world, containing neurotoxins and enzymes that dissolve muscle tissue, and the bite will spasm, increase blood pressure, difficulty breathing, confusion, and what is more terrifying is that this venom is particularly effective against primates, while other mammals have some resistance to it. Without first aid, an adult can be killed in less than 15 minutes. Before the invention of this antivenom for spider venom in 1980, many people died from their deadly venom.
4. Black Widow
The Black Widow Spider is a common name for a variety of spiders in the genus Latrodectus, a terrible name derived from the fact that females tend to eat males after mating. The body of such poisonous spiders is about 2.5 cm (1 inch) long. The male's body shape is only 1/4 of the female's, because the male is often eaten by the female after mating, so it is rarely seen. In addition to the hourglass pattern, the male has 4 pairs of light red stripes on the flanks of the abdomen. The variety of color patterns is not the only difference between black widows. The female of the poisonous spider is the most common spider in North America, black, shiny. Its ventral surface, with an hourglass-shaped shape, has a more vivid hourglass-shaped pattern, which is a typical feature of the Black Widow spider. When you are bitten by a female black widow, your risk of death is only five percent. However, Black Widow's toxicity does not have a regulated grade, regardless of which one it belongs to. Once L. Pallidus (Kenyan white widow) or L.bishopi (considered the least toxic variety) bites can still cause you unbearable pain.
Despite mild bites, their toxicity directly affects the central nervous system and muscle tissue. A victim of a Black Widow bite will immediately experience acute severe pain because the toxin directly irritates your "oversensitive" central nervous system and brings other unpleasant side effects. It is 10 times more toxic than the rattlesnake. Severe pain, nausea and mild paralysis of the diaphragm after being bitten, but recovery without serious complications. Its poisonous juice is more poisonous than that of the rattlesnake, but the amount of secretion is small, making its fatality rate slightly lower.
5. Red-backed spider
Red-backed spiders tend to live outdoors in storage rooms, gardens, or under eaves. Now, red-backed spiders have also been found in the homes of residents of Queensland and New South Wales, Australia. A relevant expert at the Queensland Museum said that the hot and rainy summer weather caused the webs of these red-backed spiders to be damaged, leaving them with no choice but to move indoors. The red-backed spider, named after a bright red stripe on its back, is a distant relative of the notorious American spider, the Black Widow. The venom in the red-backed spider may cause the death of young children, but it is generally not life-threatening to adults.
6. Reclusive brown spider
The hermit brown recluse is also translated as the brown hermit spider, also known as the violin spider. A light brown or yellow spider that is common in the western and southern United States. The scientific name is Loxosceles reclusaalso. The body length is about 0.7 cm, and the limb span is about 2.5 cm. There is a black violin-like pattern on the front half of the body (cephalothorax) and a distinct groove on the midline of the back, forming the "neck" of the violin. 6 eyes lined up in 2 rows.
It ranges to the northern United States. Its natural habitat is in caves, cavities of crillium, and other protected environments. In buildings, they usually hide in undisturbed corners, such as attics, storage rooms, walls, or ceilings. Its venom can damage the walls of blood vessels near the site of the bite, sometimes causing large areas of skin ulceration. Occasionally fatal, the wound may take months to heal.
7. Rat spider
Rat spiders belong to the arthropod phylum of the animal kingdom, arachnids, orthognaths, and radiating limbs. Eleven subspecies are known, ten of which live in Australia. Only one, called M. tussulena, was found in Chile. Rat spiders take their name from an ancient legend that has proven to be false, that spiders, like rats, dig deep burrows. The body shape of the rat spider is divided into medium and large in species, with a body length of between 1 cm and 3 cm. They have a shiny surface and a towering, broad head on which one eye is distributed, with a short nozzle head located on the back of the abdomen. There are obvious differences between male and female rat spiders, female spiders are generally black around the body, while male spiders will have different colors depending on the species. The male oriental rat spider has blue spots, while the male red-headed rat spider has a brown body and red claws. There is evidence that the damage caused by an attack and bite by this rat spider is no less severe than that of an Australian bucket web spider (very toxic). However, there are few records of this spider infestation.
8. Chinese bird-catching spider
The Chinese birdtrap is a giant spider with legs spanning up to 8 inches. Much research has been done on the venom of this giant spider because it is an aggressive creature and can poison small mammals in small doses. The spider has been found in Southeast Asia and has been found in at least one case of infant death. Only a dose of 0.70 mg is required to lead to a 50% mortality rate in laboratory rats.
9. Indian gorgeous rainforest spider
Arboreal spiders. The temperament is very fierce. Generally, the knotted web inhabits the tree hole, the action is agile, the aggression is strong, often bites without warning, and their toxicity is also stronger than that of the general hair spider, so it is not suitable for touching or playing. All members of the genus are among the most beautiful and interesting species in the family of bird-catchers, they are arboreal species and are found only on the island of Sri Lanka and in the tropical rainforests of southern India. Like other Old World bird-catching spider species, the Ornate Rainforest Spider is a very fast, aggressive, and large-haired spider covered with short hairs.
They do not use a large amount of silk to build their nests, but mainly rely on holes in the trunks to hide. Bark can be placed in the breeding to provide more room for movement, and the ornate rainforest genus is a fast-growing bird-catching spider species, usually 2-3 years to grow into adults. It is worth noting that the toxicity of this species belongs to the very largest of bird-catching spiders!
10. Yellow-saced spider
The yellow-saced spider is the least toxic of the 10 spiders listed this time, but it is still very toxic. Yellow-saced spiders can make brushed webs that you can remove with a broom or vacuum cleaner. But fortunately, they rarely approach and bite humans, and one of the dangers of their bites is closely linked to methicillin-resistant Staphylococcus aureus (MRSA) infection. The infection is very serious, and although their bites can cause osteonexia or tissue necrosis, the extent of their toxicity is still controversial.