Why do tigers run to keep out the cold?

How do all kinds of animals living in nature keep out the cold in cold winter? Surprisingly, in order to survive, they all "invented" a set of good methods to resist the cold.

Tigers run to keep out the cold: tigers run back and forth when they feel cold, and their attention is very concentrated. Even if the rabbit runs around, it won't stop until it gets warm.

Gorillas move stones to keep out the cold: once the cold comes to the mountains, the gorillas living there can't resist it, and they will run to sunny places and lift big stones to walk back and forth until they sweat profusely.

Wild deer keep out the cold: There is a kind of wild deer living in northern Russia. When it is freezing, they will find a relatively remote place and fight with each other in twos and threes until it warms up.

Rabbits hit their stomachs to keep out the cold: In winter, in order to keep out the cold, rabbits' hair will grow long and dense, under the skin.

The fat layer has also thickened a lot. When it is particularly cold, they will huddle together and beat each other's stomachs to keep warm, which is very interesting.

White mouse rolls to keep out the cold: There is a kind of white mouse in the eastern Alps, which is bigger than a cat. When the weather is cold, they will curl up into a meatball, roll down from the top of the mountain together, and then run back to the top of the mountain until it is warm.

Squirrels climb trees to keep out the cold: in the forests of northern India, when heavy snow covers the mountains, squirrels living there will run down from the trees to keep out the cold, and then climb up again, and so on until they are warm.