Most snakes can't hatch eggs. How did the snake eggs become snakes? After most snakes lay their eggs, they are left to fend for themselves without hatching. However, some snakes have the behavior of hatching and protecting eggs. For example, King cobra can make a nest with fallen leaves, and then cover the fallen leaves after laying eggs. The female snake crouches on it and the male snake moves nearby. Python, Bungarus multicinctus and Agkistrodon acutus also have the habit of protecting eggs after laying eggs, and they stay on the eggs all day long.

Python lying on the egg pile can increase the temperature of the egg by 4 ~ 9℃, which is obviously beneficial to the hatching of the egg. Although the temperature at which snake eggs hatch is that sunlight provides heat through air conduction, direct sunlight should not be used. The main reason is that it can't stand the high temperature of the sun and lose too much water, which affects the shell rate.

There is basically no need for additional heating to hatch snake eggs. Under natural conditions, poisonous snakes and non-poisonous snakes will choose a place suitable for hatching snake eggs, and the temperature and humidity are suitable. This is the nature of snakes and let them hatch naturally.

The hatching time of snake eggs varies greatly according to different kinds of snakes. Some snake eggs only need a few days to hatch, while others need several months. However, the same snake eggs are also hatched by different temperatures, and the time to hatch is also different.

The incubation temperature of snake eggs is generally 20 ~ 27℃. Not too low, once the temperature of snake eggs is lower than 20℃ and the relative humidity is higher than 90%, the incubation time will be prolonged, and some of them will not hatch; If the incubation temperature is higher than 27℃ and the relative humidity is lower than 40%, the snake eggs will become dry and hard due to water evaporation.

Some snakes are viviparous, that is, the fertilized eggs produced by in vivo fertilization of animals remain in the reproductive tract of the mother, and develop into larvae by the vitellogenin of the eggs themselves until the embryos are fully developed. Once mature, the reproductive tract of the mother will contract to expel the larvae from the body through the vitelline membrane. Therefore, the embryos of ovoviviparous animals are properly protected by the mother, and the hatching survival rate is more secure than that of ovoviviparous animals. In addition to the nutrients of yolk, the exchange of gas and the maintenance of water needed for the development of fertilized eggs still depend on the maternal supply.