Spiders are the most common animals. There are about 40,000 species of spiders in the world, which are distributed everywhere except Antarctica. Some of them are ugly in appearance, some are faltering, and some can walk and jump, which can be described as strange.
Escape Spider
In the desert of Morocco, there is a very special spider that can do somersaults like a gymnast when it escapes, thus doubling the speed of escape. This spider is called cebrennus rechenberg. When such spiders dorsay, their movement speed increases from 3.3 feet per second to 6.6 feet per second.
However, somersaults are very physically demanding for the spider and are a last resort to escape, if it flips 10 to 15 ribs a day, it may die of exhaustion.
The largest spider: the Gleas bird-catching spider
The largest spider in the world is the Gleas birdcatcher spider that lives in the wet forests of South America.
It weaves nets in the woods and feeds on nets to catch birds that cast their nets. Male spiders are 38 cm wide and weigh about 120 g when they open their claws, and the length of the poisonous claws is 2.5 cm. When it bites its prey, it first tries to make the prey unable to move, and then, injects digestive juice into the prey, at which point it can drink delicious.
The smallest spider: the Battudigua spider
The Battudigua spider is the smallest spider in the world, and because it is so small that no one has photographed it. As shown in the figure, this is an "assassin spider", it is slightly larger than the first two spiders, only one-eighth of an inch in length, it is also one of the smallest species of arachnids, it has a unique jaw and a strange extended neck, able to catch prey at a distance. The "Patu digua" (Patu digua), whose miniature body is only 0.015 inches, can easily stop on the needle of a pin.
Spider with a strange name: The Eyeless Big-Eyed Spider
Of all the animals, the oddest name is a blind spider that lives in some caves on Hawaii's island of Kauai. This is the Eyeless Big-Eyed Spider. Originally, according to the characteristics of all aspects, it belonged to the big-eyed spider family, but because it lived in a cave, it caused blindness in both eyes and left the name of "big eyes".
Mother-eating spider: Red Claw Spider
The red claw spider is a kind of mother-eater. The juvenile of the red claw spider attaches to the mother's body and eats the mother, and the mother spider also quietly allows it to eat, and after one night the mother spider is eaten by the young spider and dies.
Hunter spider
There is one of the largest spiders in the world in Australia. The large one weighs about half a pound, has eight legs, and looks ugly, but it is a good hand at catching mosquitoes, and all the mosquitoes who dare to attack have no life, and they have the skills of hunters. At the same time, hunter spiders contain a lot of protein and are a superior delicacy for indigenous people.
Bird-eating spiders
In South America there is a large spider, the largest as a duck egg, spitting silk thick and firm, forming webs in the woods, often using the webs to catch small birds. Bird-catching spiders are the "giants" of spiders, the size of a fist (5 to 15 cm), the body width can reach 25 to 30 cm when the quadruped is abducted, and the largest bird catcher spider can reach 25 cm long. Named after the prey on birds.
Throw spiders
In Colombia there is a strange "throwing spider", it is not a net to hunt, but to roll its own silk into a round ball, when there are moths, it will accurately throw the sticky silk ball, hit the moth, pull the trend, become a delicacy. At the same time, it can also release a moth-like extra-hormone to attract moths.
Funnel-shaped spider
Australia has a black spider that lives in bushes or meadows. It has a poisonous sac with a very toxic juice, and if it is bitten by a human or animal or poultry, it is in danger of losing its life within a few minutes.
Poisonous spiders
Haswell, the owner of a department store in London, guards the store for him every night with two poisonous spiders, which is also wonderful, this poisonous spider opens the door and thieves flee. The store has never lost anything in years. It turns out that this poisonous spider has two deadly toxins, and once stabbed by it, the light is severe and unbearable, and it will not heal for a long time; the seriously injured will die.
Spiders weaving fishing nets
In Papua New Guinea, the nets people use to catch fish are woven by spiders. People just weave the base of the fishing net, and then hang the "semi-finished product" between the two trees, and then the spider does most of the weaving work.
Jumping Spider Species: Giant Tooth Jumping Spider
The name Giant Tooth Jumping Spider shows three characteristics of this species: a spider with huge teeth that excels at jumping. Discovered in 2012 in Mount Kinabalu Park in Borneo, the new species uses giant teeth to fight, while researchers at the Dutch Centre for Natural Biodiversity Research, the species' discoverer, also observed their mating process. Mount Kinabalu Park in Borneo is home to a large number of new spider species, and 10 to 15 species of exotic jumping spiders were found in scientific surveys in 2012.
【Further reading】
Compared with general insects, spiders are long-lived, most spiders complete a life history, generally 8 months to 2 years, and male spiders are short-lived, dying shortly after mating. Others, such as water spiders and cunning spiders, can live for 18 months, burrowing tarantulas can live for 2 years, cancer spiders can live for more than 2 years, and bird-catching spiders have a lifespan of up to 20 to 30 years.
As we age, not only do people have difficulty concentrating as they get older, but even spiders have a similar situation. As the spider ages, its nervous system ages, and the web it weaves is not so good. The webs of young spider knots are neatly and evenly angled; the webs of old spider knots may appear to be notched and strangely shaped. The older the spider, the more unstructured the web becomes. Scientists therefore believe that over time, the animal's brain will degenerate like a human brain.
Researchers have found that ordinary spiders lose their ability to knot in the twilight years of their lives. The results of the study were produced by Myrin Anotto, a doctoral student at the University of Nancy in France. A short life of 12 months is an excellent subject for studying the aging process, she said. She presented her findings at the Society for Experimental Biology meeting in Glasgow on 2 July 2011.
Zygiella x-notata, a European spider, has a neat and uniform web of young spider knots at 17 days of age, with perfectly precise angles; but the webs of spider knots at 4 months of age (equivalent to middle age) may have gaps and strange shapes. The older the spider, the more unruly the knotted web, the more wrong it is, the more gaps there are, and the web is much larger; by the time it is 8 months old (only 27 days left before the spider dies), its knotted web can only be described as a mess. Over time, the simple brains of this arachnid will degenerate like humans, and its brains will also be "not bright."
Spiders have been in webs on Earth for at least 140 million years. The earliest spider webs were found in Cretaceous amber on Bayshire Beach in East Sussex, bound by a creature similar to today's cross-round spider.