Animals have those special skills and behaviors

1. Vipers are venomous - hunting prey

Vipers are beautiful animals. Their saliva is usually shot from their fangs and is used to paralyze their enemies. It is generally believed that venomous snakes are poisonous, however, the venom of venomous snakes can only act accordingly in the bloodstream, whereas drinking the venom will not cause any harm to the human body (provided there are no wounds in the mouth).

2. Dogs wag their tails - to please people?

The human smile and the dog wagging his tail is a similar form of communication, the dog uses his tail to imply that the heart reflects, is a kind of "language". Generally in the excitement or happy, will be wagging tail, tail not only left and right wagging, but also constantly rotating; tail up, expressed joy.

3. Electric rays can discharge electricity -- hunting prey, self-defense?

The electric ray can discharge electricity at will, the time and intensity of discharge, it is completely able to control itself. The electric ray can generate electricity, and rely on the electric current sent out to kill small fish, shrimp and other small animals in the water, is a means of predation and fight against the enemy.

4. Geckos shed their tails - in self-defense?

The gecko's broken tail is a kind of "self-defense". When it was pulled by external forces or encountered hostile, the tail muscle will strongly contract, can make the tail broken. This phenomenon is called "self-cutting" in zoology. The newly severed tail, because the nerves are not dead, keeps on moving, so that it can protect itself with a diversionary tactic to escape.

At the same time, the gecko's body has a hormone, which can regenerate the tail. When the gecko's tail is broken, it secretes this hormone to make the tail grow back, and it stops secreting it when the tail has grown back.

5. Bats can ultrasonically localize - and hunt down prey?

Most bats also have an acute auditory orientation (or echolocation) system, which allows them to send out ultrasound waves through their throats and then respond to them in order to recognize direction and detect targets. Some species have evolved special facial structures that increase sonar reception, such as nasal lobes, multiple folds on the face and large complex ears. Humans invented radar based on this feature.