Animal sappers. part 4
The bear spends most of her life in her underground passages, where she eats, gnawing at the roots of plants and causing irreparable damage in gardens and vegetable gardens. The same way of life is practiced by many insects during their larval period: larvae of May beetles, for example, spend 4 years in the ground and are pupated there. Many beetles, flies, membranes and winged beetles are also tied to the underground way of life, as long as they are defenseless, insufficiently mobile and make up a tasty prey for predators, as they accumulate stocks in their bodies for a difficult period of transformation. The adult insect, armed with its excellent devices, leaves the gloomy kingdom and rushes to the height, to the kingdom of light.
Everyone knows that a modern sapper should not only be a skilled "digger" - he must be a good carpenter, mechanic, and technician. It turns out that among the spiders there are also sappers-technicians who have developed special mechanical devices to protect their holes.
However, spiders for this purpose have, in addition to architectural talents (remember what a wonderful work of art is a spider's web), and also exceptional building materials. They have spider glands that emit sticky, quickly hardening in the air-liquid, a real "syndecone", which, as in advertising, "blinds, glues, and cements everything in the world. It is clear that with such cement, spiders can do a lot of things that are not available to other animals! After all, engineers could hardly do anything if they had no iron and concrete at their disposal!
And so, we see among the spiders such technicians as spider Mygale, which is located in the south of Europe. This black spider, covered again with short velvety hairs, pulls out not only deep, vertical, neat minks but also arranges a dense lid from the web and the grains of sand that it creates, which opens outward. From a web the loop to which the cover is attached to walls of a hole is arranged. Not only that, there are recesses in the lid, in which the spider inserts his claws to hold the lid when there is a danger. The genius builder invented both a hinge and a bolt at the same time!
One of the Venezuelan spiders Stathis astute makes the mink even more complicated. It has the shape of the letter U and. besides the entrance, it has an exit, and both are equipped with movable covers. When the spider will not be able to defend one of the entrances when the enemy attacks, he has the opportunity to "move to pre-prepared positions" through the second hole!
Finally, another Venezuelan structure spider constructs a complex hole of three compartments, communicating through narrow holes that are covered by each hinged lid. Thus, if the enemy even overcomes the first two obstacles, he is faced with the third one - a principle on which to build an increasingly modern fortifications!
The examples given show us that the art of demining is widespread in the animal kingdom. Of course, this is not an art in our sense of the word, but a complicated construction instincts. But isn't it surprising that in the animal kingdom the height of development and perfection of the organization doesn't provide completely from enemies on the surface of the earth and above the ground? The most highly organized animals go underground, change the sunlight for dampness and darkness of the underground kingdom!
Similarly, modern high culture does not provide a man from the horrors of war, and modern, armed from head to toe of the army buried in the ground like moles, hiding from the new eye-catching predators - from the airplanes with their bombs and from the artillery, armed with binoculars and the most accurate mathematical calculations ...