Bats appear in spring in the north. What's going on here?

Bats come out in the northern spring because the weather is getting warmer, and bats end their hibernation.

Bats arrive in March 165438+ 10.

Bats have the habit of hibernating, which generally lasts from 65438+February to late February.

When hibernating, the ability of metabolism is reduced, breathing and heartbeat are only a few times per minute, blood flow slows down, body temperature drops to the same temperature as the environment, but hibernation is not deep, sometimes it will excrete and eat during hibernation, and it will return to normal immediately after waking up.