Most people do not like or even fear spiders. They do not treat the web either – an effective trap, by means of which spiders catch their victims. Meanwhile, the web is one of the most perfect creations of nature, which is distinguished by a number of amazing properties.
Initially, the web is stored in liquid form
Inside the spider web is stored in a liquid form and is a protein with a high content of glycine, serine and alanine. When you separate the liquid through the spinning tubes, it instantly freezes and turns into a web.
Not all webs are sticky
The radial threads of the web, along which the spider usually moves inside its trap, do not contain any sticky substance. Hopper threads – thinner and lighter – are arranged in rings and covered with the smallest droplets of sticky substance. It is to them they are attached to the inattentive victims of the spider.
But even if the spider for some reason is forced to move from the radial thread to the ring thread, it will not stick to it anyway: it’s all about the hairs that cover the legs of the arthropod. When the spider paws on the thread, the hairs collect all the sticky drops. After the spider lifts the leg, drops from the hairs again drain onto the thread of the web.
The strength of the web is affected by light, temperature and humidity
Adhesive, which binds together threads of a web, changes its stickiness depending on the weather conditions. It is established that finding a web in a dry and hot place reduces its strength. The direct sun’s rays will further weaken the connection of the filaments with each other and make the web even less strong.
Spiders use cobwebs not only for catching prey
The web is used by spiders not only for making excellent traps. For example, some species use cobwebs for mating games – females leave a long thread, walking along which the passing male can reach the coveted goal.
Often spiders braid their mink with cobwebs. Others use threads as ropes, through which you can go down. If the spider lives at altitude, under its shelter, he can stretch a few safety threads, so that when falling, there is an opportunity for them to catch on.
The original way of using the web was found by some representatives of a family of spider-spiders living in the tropical forests of the Amazon. They weave a thread a few twigs in such a way as to make them look like an insect. Then, after a certain distance, the spider pulls the threads, causing the cast to move, simulating the movements of the insect. This method helps spiders to distract the attention of predators and, while the enemy examines the model, the arthropod appears to be able to escape.
Spiders of some species leave an electric charge on the web
A real surprise was the news that spiders like Uloborus Plumipes, while weaving their ultra-thin web, also rub it with their feet, which gives the trap an electric charge. When an insect with an electrostatic charge is next to the cobweb, the trap is instantly attracted to it at a speed of about 2 m / s.
Some webs are striking in their length
Spider web of Darwan spider can scare even the most courageous person: its catching area can reach 28,000 cm², and the length of some threads is up to 28 meters!
The threads of the spider Darwin, stretched above the river
At the same time, the fastening threads of such cobwebs are highly resistant: for example, they are 10 times stronger than Kevlar – a material that is used as a reinforcing component in bulletproof vests
Some spiders can weave cobwebs even under water
It’s about a silver spider, which can stay under water for a long time. When immersed in the water between the hairs of his abdomen, air bubbles are trapped, which the spider uses to breathe under water.
Spider-silver underwater | a source
These bubbles in the water are cast by silver, which makes the spider its name. The spider has enough air for a long time: it manages to create an underwater cobweb that sometimes goes over to the surface.