Without guilt snakes
In the past, ancient scientists thought that all the snakes inhabiting the planet Earth, are poisonous. Fortunately, it is now known that it is not. However, even today you can hear the opinion that the vast majority of snakes are poisonous. For example, these include harmless smooth snake, snakes, etc. Often due to a simple Zoological illiteracy of mass destruction exposed a snake that will benefit, not harm!
How to distinguish poisonous snakes from non-poisonous?
The shape of the head. Today zoologists argue that poisonous snakes are distinguished from non-poisonous, first of all, the shape of her head. The fact that the head of a venomous snake looks very much like the tip of the spear, i.e., maximum pointed to his mouth. Head of non-poisonous snakes, by contrast, has a more rounded shape (be aware of snakes or snakes).
The structure of the teeth. Venomous and non-venomous snakes have a completely different structure of their teeth. The snakes, representing a direct threat to human life, the front of the mouth there are two large and curved (sometimes straight) of the movable tooth. When the snake closes its mouth, then his fangs, as if folding camping knife, hiding instantly in the mouth.
Inside poisonous teeth is a special channel, outlet hole of which opens at the front of the tooth (next to its apex). The reason poisonous teeth come special excretory ducts of glands that produce a venom. Non-poisonous snakes have these teeth just yet!
In addition, the teeth of poisonous snakes reach a length of 1-2 cm, are thin. Because they are moveable and resemble folding knife, then at the time of application of the bite they take in the mouth a vertical position. Folds, which at the moment of closing of the mouth hide teeth, sometimes so thoroughly disguise them that at the time of inspection can prevent a fatal mistake. If time does not notice the poisonous teeth of the snake, you can take her for a harmless reptile, and become less cautious.
Bite marks. A snakebite on the skin are specific marks of teeth having the shape of two Crescent-shaped strips, which, in turn, form a semi-circle of small dots. A bite in front of the resulting semi-oval will be clearly visible for two wounds – the marks of two teeth. Usually one immediately after the attack snakes oozing blood.
Common mistake. Often people believe that snakes "sting" them with his stinger, which protrudes from the mouth. It is not so. First, it's not "the sting", and forked tongue. Secondly, snakes use this gentle and mild on only for a peculiar smell, and touch. The language they examine the surrounding objects, but not "sting" people. By the way, the language is as poisonous and non-poisonous snakes!
Dangerous snakes. All venomous snakes that live on the planet Earth are divided into four families: vipers and pit vipers (Viper, Viper, adder, etc.) asps (cobras, coral snakes, etc.); rattlesnake (Copperhead, crotalid and others); sea serpents.