Air temperature in winter. How does it affect the life of living organisms in winter?

The air temperature drops dramatically in winter. In general, it depends on the climatic zone, from 0 to -50 and even lower. Naturally, this affects the life of organisms. Some of them prefer to avoid winter with the appearance of cold weather – for example, birds fly to a warmer place. Some of the organisms have been storing subcutaneous fat all summer and, when the temperature becomes close to zero, they will slow down their metabolism and go into hibernation in order to wake up with warming. Particularly brave and adapted animals decide to spend the winter in the cold. They shed, changing their skin to a lighter one and growing a thick undercoat.