Interesting facts about birds in winter

How do sparrows not turn into icicles at -20°C at night?
Small birds do not freeze in winter because they have dense downy plumage, high metabolism, and body temperature, and their feathers are covered with a fatty layer. Birds hide their heads under their wings and their feet in their feathers, sleep closely together in shelters, and feed intensively.

How do ducks sit calmly on the ice in winter without their feet freezing?
Ducks do not get frostbitten feet in winter because they have a special circulatory system with heat exchange in their paws, dense skin with scales, and few nerve endings. Their compact paws reduce heat loss, and protective feathers and down on their bellies also help to keep them warm.

Why do crows slide down roofs and snowdrifts in winter?
This is a form of play activity through which birds entertain themselves, relieve stress, train coordination, and learn about the properties of different objects and the surrounding world.

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