Why are birds and rats in the same cave?

This symbiotic phenomenon can be seen on the savanna steppe of Xinjiang, Qinghai (China). For example, wild rats are in the same snow or a ghost.

Rat Cave (Photo: kittywompus)

Someone once saw the bird standing on the back of the mouse, walking together, spreading the wings, mouths making complicated cries, refusing to jump down.

The cause of this situation is the hot and cold on the savanna savannah changed greatly, the temperature between the day and night is very high, the forest is low, the site is lost and the birds are nested and the enemies are avoided. In this area, wild rats are very popular, rats are everywhere. The temperature in the cave is stable, avoiding heat or cold, so the cave becomes a good environment for birds to nest and breed.

Birds and mice are homosexual, both are beneficial. Birds are very wary, can change the realm of the realm, if in danger, it will immediately fly up and shout, telling the mouse to hide in the cave.