Talk about the hibernation of snakes and bats.

Snakes are warm-blooded animals. Its body temperature often changes with the change of temperature in four seasons, and its metabolic rate and activity in the body are also closely related to the change of body temperature. When the body temperature is high, the metabolic rate is high and the activity is frequent; When the body temperature is low, the metabolic rate is low and the activity is weakened. Generally speaking, late spring and early winter are the golden seasons for snake activities, especially in hot summer and autumn. Snakes are the most active, often wandering around, looking for food day and night. As the saying goes, "seven horizontal and eight hanging trees" vividly shows that July, August and September are the peak of snake activity. However, snakes love heat to some extent, especially in hot summer. They like to live and live in cool places such as trees, grasslands and streams. From autumn to winter, with the gradual decline of temperature, the metabolism of snakes decreases, and when their physiological activities slow down to a certain extent, they gradually enter the "hibernation" period. Generally, poisonous snakes have been hibernating in caves since the end of June. At this time, dozens or even hundreds of them often gather in caves or tree holes in Gao Qian to hibernate for the winter. It was not until the next spring that the ice and snow melted that I woke up from my dormant state and started a new life in the new year. It takes about three months from entering the cave to entering the hibernation period, and it is mainly supplemented by nutrients stored in the body in the form of fat to maintain its minimum survival nutrition.

When bats hibernate, the bone marrow is still working, and the midbrain replaces the diencephalon as the change center of the thermal regulator.