There is a curious delusion as if dragons consist only of the heads and tails. In fact the snake tail makes only twenty percent from all its length.
Beginning of a tailAt people normal thirty three vertebras which form bones in a neck and a spine column. At snakes vertebras can be ten times more. And from the most part of vertebras edges grow. In the place where edges come to an end, and the tail begins. At a snake the tail begins directly behind a foul place.
Amphibia have it, birds and reptiles. She received the name in honor of the antique sewerage of Ancient Rome. In case of a snake the foul place is the small removing opening being on a bottom side of a body. The foul place, in fact, is the snake back so, as well as at the majority of animals, the snake tail begins from this part of a body.
If to place a snake in narrow and close space, she can consider own tail the enemy, attack on it and swallow. In certain cases snakes can choke to death.
The foul place at a snake is very multipurpose. First, it serves for removal of urine and excrements, and snakes have separate no channel or passes for each type of this biological waste. Secondly, the foul place is used during pairing and postponement of eggs. Males in a foul place have "semi-penises", during pairing the males turn out them in such a way that they stick out directly of a foul place. Such "semi-penises" significantly differ at different types of snakes, as well as "reception openings" at females so among themselves different types cannot copulate.
In Southeast Asia there is a species of the planning snakes. Such dragons are displaced by a spring, make a start from a tree and in a jump are flattened out, doubling the area of the body.
Different dragons are different tailsDifferent types of a snake can have absolutely different tails. Slepozmeyki, for example, possess tails which are shorter than their trunks by fifty times. On the end of their tails there are dense thorns which slepozmeyka rest against a surface and drill the heads underpasses. The American rattlesnake during evolution got a rattle on the end of a tail. This rattle vibrates when the snake wants to announce the presence. This sound frightens off many animals. The rattle can make up to fifty fluctuations a second. Indians considered this sound one of the most frightening "natural" sounds of the nature. Recently opened lozhnorogaty viper at a tip of a tail has an outgrowth reminding a spider. This ornament serves as a bait for birds which with pleasure the lozhnorogaty viper eats.