Cold weather: how do animals spend the winter?

Groundhogs hibernate in caves, cranes fly far away, and animals have various ways to spend the winter. -About the author: Monica Langer, born in 1968, master of biology, film teacher. 1997 started writing popular science books for children, 1998 moved to Seattle, USA. -Directory: In summer and winter and autumn, animals are busy storing winter grain. In autumn, migratory birds fly to warm southern animals and put on warm winter clothes. Groundhogs don't care about winter in caves. Is it warm? Besides humans, the bodies of bears, birds, squirrels, cats or dogs are also warm. To keep warm, they have fur or feathers. Lizards, snails or fish are different. Only when the external environment is warm will their bodies be warm. Once the external environment becomes cold or frozen, the lizard stops moving and its body becomes cold. They climbed into the abandoned mouse hole and waited for the arrival of spring. In winter, there are no mosquitoes and flies for the frog to eat, so it has to drill into the mud of the pond for the winter. It becomes cold and hard in the mud and breathes through the skin. The snail found a safe place for himself in the crack in the wall and sealed the shell with a lid. Illustration: