When did the snake start to enter the cave?

The time is not necessarily, mainly depending on the local climate and temperature. When the ambient temperature is lower than 15℃, snakes will enter caves and hibernate.

The human factor that has the greatest influence on hibernation is temperature. Because most snakes hibernate in natural caves, in order to hibernate successfully, cave snakes and some snakes with the habit of digging holes can enlarge the holes deeper.

But most snakes can only use natural cracks or caves made by other animals for winter. Therefore, the factors that affect the temperature conditions of hibernating caves are the main factors that affect the hibernation of snakes.

Extended data:

Poisonous snakes and non-poisonous snakes are mainly based on the following points:

1, poison gland: Some poisonous snakes have poison glands, while non-poisonous snakes have no poison glands. Poisonous glands evolved from salivary glands. Located on both sides of the head and behind the eyes, it is enclosed in the muscles of the jaw and can secrete venom. When a poisonous snake bites something, the muscles around the poisonous gland contract, and the venom is injected into the bitten body through the venom tube and the fangs to poison it, but no poisonous snake has this function;

2. Venom tube: it is a pipeline for transporting venom, which is connected between poison glands and fangs. Only poisonous snakes are poisonous tubes;

3, fangs: poisonous snakes have fangs, located in front or behind the non-toxic teeth of the maxilla, longer and larger than the non-toxic teeth.

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