Ptarmigans are birds that live in the Arctic all year. They change the colour of their feathers from brown in the spring to white during the winter. This change protects them from predators because they blend into the natural surroundings. They have water-repellent outer feathers in addition to inner feathers to stay warm during the cold months. They also grow feathers on the soles of their feet to keep them warm. They act as snowshoes to prevent them from sinking in the snow. Another way they stay warm is to dive into large piles of snow, where the snow acts as a blanket and traps heat from the ground.
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