The most incredible facts about spiders you probably did not know! Read more to find out! You will be shocked.
With their eight legs and multiple eyes, spiders often frighten people, although some really love them, and even keep at home as a pet. However, scientists believe that this is an amazing and charming animals, who have their own secrets. Below you will find the most striking and unusual facts about these creatures.
There are over 40,000 species of spiders. With some of them, we constantly intersect at home, at the cottage or outdoors. But in reality, what you know about these weird animals, arachnids to be more precise? Despite the fact that their appearance is attractive enough, most spiders do not deserve to be shunned and feared because they are completely safe for humans. While in the world, of course, there are also extremely dangerous poisonous spiders, the bite of which can cause a person's death.
So here are some interesting spider facts, which everyone needs to know.
1. Spider is a useful creature. A spider kills a year around 2000 harmful insects that are inadvertently caught in its sticky network. In general, flies and mosquitoes have become a victim of most spiders. Scientists have counted that, for example, in France, every year, the spiders consume 400 million insects per hectare. This means that the spiders carry weighty ecological role, as they protect crops from the numerous pests.
2. Warning: false friends! «Tarentule» and "Tarantula" - this is not the same "beast." Tarantula (Tarentule) - is a mythical spider Tarente region in Italy. Between the XV and XVI centuries in Italy, it was thought that this spider causes the disease known as tarantulizm (tarentulisme) or tarantizm (tarentisme). At that time there was a belief that people who were bitten by this type of spider became insane. Experts who have studied the fauna of the aforementioned Italian region think that is actually quite harmless spider formed the basis of this legend: Lycose de Tarente (Lycosa terantula). It belonged to the family of wolf spiders. In fact, its venom is not dangerous to humans. Well, the tarantula (Tarantula) - a genus of large venomous araneomorphae, but also from the family of wolf spiders. At night these spiders get to the surface and actively move along the ground, hunting for insects. Tarantulas do not spin trapping nets and used only as a spider's web covering the walls of their burrows (depth of which reaches up to 60 cm) and in the construction of the egg cocoon.
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3. The largest known spider in the world - is a spider Galiaf (Theraphosa blondi). It can reach 30 centimeters. This hunter and birds eater. However it is also happy to eat insects, rodents, amphibians or even snakes. The hair of this spider is poisonous and can be dangerous for humans, but their venom is not lethal.
4. There is a unique kind of the well-known vegetarian spider. He is named after the famous carnivorous: Bagheera kiplingi takes its name from the Book of the jungle and the black panther Bagheera (Bagheera) Kipling. This jumping spider feeds mainly on leaves of plants, especially acacia, which are rich in proteins. He can also eat nectar and larvae of ants (although this is very rare).
5. Spiders are found everywhere except the Antarctic cold. This is the only continent where spiders cannot survive due to extreme cold weather. There you can find a spider crab, which is in no way part of the class of arachnids. But in the Arctic, experts have counted about 1000 different species of spiders.
6. Not all spiders produce silk thread of the same type. The most durable silk thread spider produces Darwin (Caerostris darwini). This is actually the most robust and, unfortunately, not been studied in detail the biological material ever. On the strength of it is 10 times better than the famous Kevlar material, known for its heavy-duty, which is often used to create body armor, as well as for the reinforcement of copper and fiber optic cables.
7. Spider-banana (Phoneutria nigriventer) is the most venomous and aggressive spider in the world. It is part of the rare spiders that are very dangerous for people. Poison Spider-banana contains a neurotoxin PhTx3, which can paralyze the muscles, and human breathing, causing suffocation. However, it not always injects venom during a sting.
8. Spiders are able to set aside at once several thousand eggs. So, there are spiders who lay a single clutch of eggs 3000, but statistics eggs turning into spiders is quite sad. For every 100 eggs or newborn spiders, survive and survive to adulthood, only one. Spider eggs are protected by a cocoon.
9. Harvestmen, which we often see everywhere, are very similar to the spiders, but unlike them have sigmentirovannoe abdomen, connected to the cephalothorax broad base and not stalk.
10. Some spiders can perform spectacular jumps. For example, spiders Salticidae family. They are usually undersized, but they can jump a distance that is 50 times their own size. At the same time, they are deploying a silk thread, which serves as a shock absorber. It allows the spiders to stabilize their flight and provides an accurate fit in the right place. These spiders are also more attractive comparing to all the others.
11. Water spider can live under water. These spiders are Argyroneta aquatica. It lives in the spaces of clear and calm waters. To live under the water, a spider creates around itself a bubble of air, allowing it to breathe freely. Despite the fact that the venom of this spider can be dangerous, this spider is quite rare, so it does not pose a serious threat to humans.
12. Blood of spiders becomes blue outdoors. It did not have anything to do with the blood of humans or animals. In essence, spider has no blood. Instead, there is so-called hemolymph. Spiders have not veins and arteries. Hemolymph provides connection between the animal bodies. While human blood is based on the hemoglobin molecule that contains iron, hemolymph is based on hemocyanin that contains copper. Blood of spiders is transparent, but on the air it becomes blue, as we have said.
13. Some spiders are edible. In Asia, some spiders are prepared and used as food. They can be bought in the market or in the restaurant. In Cambodia, fried spider is a typical delicacy. There spiders are fried in oil and served as a delicacy. Under a crisp tender meat is hidden.
14. Large spiders often live in our homes as domestic "animals". Such a large spider Tegenaria duellica, despite its impressive size and speed of movement, is completely safe for humans and can live in his house as a favorite pet. When moving this spider overcomes 0.53 meters per second! It's fantastic!
15. Arachnophobia. From 3.5 to 6.1% of the total population of the planet are afraid of spiders and suffer arachnophobia. Even photo of spider can cause them increased heart rate, shortness of breath, panic, hysteria. But in fact, the poor spiders have much more reason to have fear, fear of man.
16. How spiders use the power of electricity for catching the victims?
The glue that spiders web yarn is covered with, not just keeps flying insects. Due to their electrostatic properties, the web strands stretched themselves to insects, that in the course of the flight and the air friction on the currently accumulated static charge (whether positive or negative). The filaments may vary up to 2 mm, but at high speed - 2 m / s. It has also been found that the adhesive web is deformed helix electrostatic field of the Earth at a distance of several millimeters. Can insects, such as bees, in advance feel the strain and adjust their course to avoid becoming a victim of a spider is still a mystery.
Hopefully, you have enjoyed these spider facts!