What happens to animals in winter?

Different animals spend the cold winter season differently. For example, many animals, especially birds, migrate south in winter, where it is warm even at this time of the year. There are some animals that hibernate in winter. Among them are amphibians and reptiles, as well as many mammals such as bears, etc. Others remain awake in winter, and their bodies are largely adapted to life in very cold conditions. For example, moose and reindeer have learned to dig snow and look for grass, foxes and owls can catch mice in the snow, etc.