The shape of spiders varies greatly between men and women. Most male spiders are smaller than female spiders, and some kinds of female spiders are 1000- 1500 times larger than male spiders, so when spiders mate, like mantis, male spiders are often in danger of being eaten by female spiders. Therefore, when male spiders want to mate with female spiders, they must carefully test whether the female spiders agree in advance.
There are about 40,000 kinds of spiders in the world, which are distributed everywhere except Antarctica. Some of them are ugly, some are stumbling, and some can walk and jump, which is strange.
"The world's smallest spider" has a small spider that lives in the tropical forests of Panama, with a body length of only 0. 8 mm, probably the smallest spider in the world.
"Spider with Strange Name" Among all animals, the strangest name is a blind spider that lives in some caves in Kauai, Hawaii. This is an eyeless spider. It turns out that it belongs to Arachnidae according to various characteristics, but it is blind because of its Qiaoju cave, which makes the name "Big Eyes" empty.
The red-clawed spider is a mother-eater. The young spider of the red claw spider adheres to the female spider and bites the female spider. The mother spider also let it bite quietly. After one night, the mother spider was killed by the little spider.
Australia has one of the largest spiders in the world. The big one weighs about half a catty and has eight legs. It looks ugly, but it is a good hand at catching mosquitoes. Any mosquito that dares to raid has the ability of a hunter. At the same time, the hunter's discovery contains a lot of protein, which is an excellent delicacy for the aborigines.
"Bird-eating Spider" has a very big spider in South America. The biggest spider is as big as a duck egg, and its silk is thick and strong. It weaves webs in the Woods and often uses it to catch birds.
"Spider throwing" is a kind of "spider throwing" unique to Colombia. Instead of dragnet hunting, it rolls silk into a ball. When there is a moth, it will accurately throw the sticky ball at it, hit the moth and pull it into delicious food. At the same time, it can release a moth sex pheromone to attract moths.
"The most poisonous spider in the world" There is a kind of black spider that lives in bushes or grass in Australia. It has a poison sac, which contains highly toxic venom. People, animals or poultry are bitten by it, and they are in danger of losing their lives within a few minutes.
Haswell is the owner of a department store in London. He guards the store for him with two poisonous spiders every night. As luck would have it, the poisonous spider closed the door and the thief escaped. For several years, this shop has never lost anything. It turns out that this poisonous spider has two deadly toxins. Once stabbed, the pain is unbearable and will not heal for a long time. The worst person will die.
"Spiders who collude with plants to eat people" In some forests or swamps in the Amazon basin of the United States, there is a kind of hairy spider that lives in groups. This kind of spider likes to live near sunflowers. It turns out that this flower is big and beautiful, and it can attract some people who don't know the truth to see it. Whether people touch its flowers or leaves, it will quickly roll up its branches and leaves and entangle people. At this time, it sends a signal to the hairy spider, and groups of hairy spiders come to eat people. The remaining bones and meat rot and become fertilizer for sunflower.
"Spider Weaving Fishing Nets" In Papua New Guinea, the fishing nets people use to fish are made of spiders. People just need to weave the bottom of the fishing net, and then hang the "semi-finished product" between two trees, and then the spider will finish most of the work of weaving the net. The spider silk here is very strong, and the woven fishing net can last for two weeks.
Spiders, bees, Araneae. The body is divided into chest and abdomen, and there is an abdominal handle between them. The abdomen is not segmented. Most pliers are pliers. There are four pairs of walking feet in the head and chest, and a rotator in the abdomen. The respiratory organs have one or two pairs of lungs, or two trachea. There are many kinds. Such as wall lines, cobwebs, entangled brides, etc.
Spider's blood is blue.
Spiders are carnivores. Spiders that don't weave webs, such as tarantulas, jumping spiders and crab spiders, are preying. Web spiders, such as spiders, use cobwebs to catch insects.
Spider silk is sticky. When an insect sticks to the net and struggles, the spider will immediately climb from its hiding place to the net, pierce the insect's body with its claws, inject venom into the insect, paralyze it, and then secrete digestive juice to dissolve the tissues in the insect, thus becoming liquid food that the spider can eat.
Most of the insects that spiders prey on are pests, so spiders are animals that are beneficial to human beings. There are about 1000 species of spiders found in China.
Indian spiders can eat nothing 18 years.
The shape of spiders varies greatly between men and women. Most male spiders are smaller than female spiders, and some kinds of female spiders are 1000- 1500 times larger than male spiders, so when spiders mate, like mantis, male spiders are often in danger of being eaten by female spiders. Therefore, when male spiders want to mate with female spiders, they must carefully test whether the female spiders agree in advance.
2。 Strange spiders spiders are the most common animals. There are about 40,000 kinds of spiders in the world, which are distributed everywhere except Antarctica. Some of them are ugly, some are stumbling, and some can walk and jump, which is strange.
"The world's smallest spider" has a small spider that lives in the tropical forests of Panama, with a body length of only 0. 8 mm, probably the smallest spider in the world.
"Spider with Strange Name" Among all animals, the strangest name is a blind spider that lives in some caves in Kauai, Hawaii.
This is an eyeless spider. It turns out that it belongs to Arachnidae according to various characteristics, but it is blind because of its Qiaoju cave, which makes the name "Big Eyes" empty.
The red-clawed spider is a mother-eater. The young spider of the red claw spider adheres to the female spider and bites the female spider. The mother spider also let it bite quietly. After one night, the mother spider was killed by the little spider.
Australia has one of the largest spiders in the world. The big one weighs about half a catty and has eight legs. It looks ugly, but it is a good hand at catching mosquitoes. Any mosquito that dares to raid has the ability of a hunter. At the same time, the hunter's discovery contains a lot of protein, which is an excellent delicacy for the aborigines.
"Bird-eating Spider" has a very big spider in South America. The biggest spider is as big as a duck egg, and its silk is thick and strong. It weaves webs in the Woods and often uses it to catch birds.
"Spider throwing" is a kind of "spider throwing" unique to Colombia. Instead of dragnet hunting, it rolls silk into a ball. When there is a moth, it will accurately throw the sticky ball at it, hit the moth and pull it into delicious food. At the same time, it can release a moth sex pheromone to attract moths.
"The most poisonous spider in the world" There is a kind of black spider that lives in bushes or grass in Australia. It has a poison sac, which contains highly toxic venom. People, animals or poultry are in danger of losing their lives in a few minutes if they are bitten by it.
Haswell is the owner of a department store in London. He guards the store for him with two poisonous spiders every night. As luck would have it, the poisonous spider closed the door and the thief escaped. For several years, this shop has never lost anything. It turns out that this poisonous spider has two deadly toxins. Once stabbed, the pain is unbearable and will not heal for a long time. The worst person will die.
"Spiders who collude with plants to eat people" In some forests or swamps in the Amazon basin of the United States, there is a kind of hairy spider that lives in groups. This kind of spider likes to live near sunflowers. It turns out that this flower is big and beautiful, and it can attract some people who don't know the truth to see it. Whether people touch its flowers or leaves, it will quickly roll up its branches and leaves and entangle people. At this time, it sends a signal to the hairy spider, and groups of hairy spiders come to eat people. The remaining bones and meat rot and become fertilizer for sunflower.
"Spider Weaving Fishing Nets" In Papua New Guinea, the fishing nets people use to fish are made of spiders. People just need to weave the bottom of the fishing net, and then hang the "semi-finished product" between two trees, and then the spider will finish most of the work of weaving the net.
The spider silk here is very strong, and the woven fishing net can last for two weeks.
3。 The mystery of cobwebs In Greek mythology, spiders are the embodiment of textile craftsmen. Indeed, spiders can be called first-class weavers. Even mathematicians can hardly find anything wrong with cobwebs.
Spiders live on their webs. Spider webs are so sticky that once small insects touch them, they can't escape with their wings. Spider webs can't stick to spiders because they have a layer of lubricant on them. The small area in the center of the spider web is the spider lounge, which is not sticky, and the frame and radius line are not sticky. Spiders generally have six looms, located near the anus. Each textile machine has a conical projection with many openings and ducts connected with silk glands, which can produce various kinds of silk. If you look under a microscope, you will find that a textile machine is like a dexterous finger. They thread, comb and twist wires like running water. Spider silk is the common product of many glands. It is spun from many different finer filaments. Silk is a kind of bone protein, which is liquid in the body. When it is discharged from the body, it will immediately harden into silk when it meets air. The thinnest spider silk is only one millionth of an inch in diameter. A spider silk that can circle the earth once weighed only 168 grams. In people's minds, people think that spider silk is fragile, but this is not the case. Steel wire as thick as spider silk is not as strong as spider silk, and some spider webs can catch small fish underwater.
Scanning with high-power electron microscope, we can see that a spider silk is twisted by two different threads: one is dry and straight, which can only be stretched by 20%; The other viscous spiral can be stretched four times and will not sag after recovery. This is a "demon rope". The rope is covered with a layer of colloidal droplets, and each droplet has a small ball. When an insect is caught and struggling, it will collide with a droplet, in which the filament will stretch, thus increasing the length of the thread. Of course, it won't be broken, but the more you earn, the stronger your hoop will be.
Just like a tight hoop, the tighter the hoop, the greater the interference Sun Shengda received in Tiangong 'ao, which made him roll around the ground.
Spider webs vary in size and shape. Spider's web is very big, like a wheel; The spider's web in the forest is like a shed; Spider web is like a cage; The water spider's web is like a clock; The grass spider's web is a hammock. Some spiders can also weave a whole set of rope-like webs and swish them in the air. Some spiders can weave a dense web and put it on straw. It spreads out in the breeze, just like a sail on a ship. There is a spider in South America. Its net is very small, only the size of a stamp. This spider has no patience to wait. It always trawls with its first four legs. When it sees the right passerby, it will cover the net at any time. There is a spider in Guatemala. Dozens of spiders always gather together to weave a huge web. The color and pattern of the net are beautiful, and the local residents use it as curtains.
The spider is engrossed in weaving the web, even if it falls outside, it is still weaving the web in an orderly way. It usually takes only 25 minutes to weave a net, but it may take one or two times longer if it is affected by wind and environment. After weaving a web, some wily spiders will add a safety belt under the web.
Like other creatures, spiders have gone through a long evolutionary process. The earliest spiders could only pull one silk, which was as monotonous as a clothesline.
So far, there is a kind of "fisherman" spider in the tropical forests of South America. It chooses a light and straight branch in the forest as a "fishing rod", spits out a long spider silk at the end of the fishing rod, and a sticky spider silk is wrapped around it, which becomes a "fishing line" and a "bait". When insects fly around in the forest looking for food, they often regard the "bait" floating in the wind as their favorite food. When there is no wind, the "fisherman" spider will pull the spider silk with its front foot, make the "bait" swing, and set up a "maze" to lure insects into taking the bait. When the insect flies on the bait, the mucus will catch it, and the spider will climb down the wire and eat the insect.
Although most spiders have four pairs of eyes, their eyesight is poor. Only those spiders who don't eat the web can see farther, but it is only 30 cm.
Because of this, when spiders crawl, they always drag a dry silk behind their tails to keep in touch with the back road. Biologists call it a "guide rope".
Spider silk is also the lifeline of spiders. When it suddenly falls from the air due to an earthquake, the line will hang it. Spider silk also has the function of spreading and running. Small spiders can release long silk and let the wind blow them far away.
American scientists recently pointed out that cobwebs are also a symbolic language, and this code may be the most magical in biological languages. Through this net, spiders chat with their neighbors, love their spouses and persuade their prey to give in.
Spider is a magical creature, and its web is a wonderful artistic crystallization.
With the development of science, spider science has now become a science, and many people are looking forward to seeing some new natural secrets through that crystal silk.
4。 Spiders helped Napoleon. Many spiders weave their webs before dawn because the temperature is the lowest. Spider silk contains jelly, which easily absorbs water and loses its viscosity. If the air is humid, spiders in the wild will be sensitive to the air and stop weaving. Weaving webs in low temperature and dry conditions-this characteristic of spiders helped Napoleon win a war.
1in the late autumn of 794, Napoleon's army attacked the Netherlands on a large scale. The Dutch opened the floodgates of various rivers and blocked the French army with floods. When the French army was preparing to retreat, it received a report saying that "spiders are weaving webs". Napoleon made a decisive decision and ordered that he would stand by and be executed on the spot. It turns out. Spider webs indicate that dry and cold weather is coming. Soon, the cold wave struck, the rivers and lakes were frozen, and the French army stepped on the ice and captured the Utrecht fortress in the Netherlands.
Although spiders helped the generals, they never joined the army sequence, and their role in directly participating in the war was far less than that in military bionics.
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