The spider-spider got its name not by chance. The fact is that on its back there are bright spots, which are arranged in such a way that a well-marked cross is drawn. In addition, the places in which he lives, involve a certain risk for his life.
Where does the spider-cross?
Ordinary crosspiece can be found throughoutEurope. His favorite habitats are forests, bushes, gardens. Typically, the crosses can be seen at a height of about 30-150 cm above the ground. Spider-spider adores raw places, in which there are a large number of mosquitoes and flies - a favorite food of this creature. However, such habitats are often associated with a certain risk to the life of a spider.
That is why many Krestoviki generally live incrowns of trees on an unattainable height for enemies. They build themselves a secluded refuge from the leaves, pulling their web among the branches. By the way, often a spider web can be seen under the eaves of abandoned architectural structures, as well as in the window frames of your own home. Since the web is an indispensable attribute of the life of a spider-cross, its dwelling without it is simply impossible.
Strong cobweb is the main attribute of the cross
In principle, the enemies do not slumber and at the heighttree crowns. In this case, to the aid of the crosspiece (though not always) comes his competently woven web, which he is forced to maintain every day in integrity and safety. Because of the restless flies and the catching of the net of the crosspiece, it always requires minor repairs. In addition, it is destroyed by small and large insects, animals and even humans (for example, woodcutters and woodcutters). Since the basic law of survival of a spider-cross is tight and time-woven web, the way of constructing a spider web is rather curious. The substance emerging from the cobweb warts located on the edge of the abdomen of the crosspiece, freezes in the air and forms strings of surprising and extraordinary strength. The crossbread pins attach the main thread to the highest point on the spot that he chose as his home. Basically, this happens between two branches or trees. When the cross-piece fixes the first part of the "foundation", it begins to swing until it grabs the neighboring side branch. As a result, a crossbeam is obtained. To tighten the upper transverse thread tightly, the crosspiece must be moved from one tree (or branch) to another, and this is rather expensive. If such a thread is tight enough, the spider begins to strengthen it with additional short transverse threads. As soon as the main extreme filaments are stretched, a peculiar arachnoid frame will appear. After this, the crosspiece moves along it, stretching its transverse threads. It is curious that this miracle-builder with geometrical accuracy counts each step. The cross takes the intersection of its diagonals beyond the center of the future web and begins to pull radial rays. When this stage is completed, the spider-cross will only have to connect the obtained threads in a circle.
