Do willow ptarmigans hibernate

Willow ptarmigans do not hibernate; instead, they adapt to cold environments by changing their plumage color with the seasons. In winter, their feathers turn white for camouflage in snow, while in summer, they become brown or mottled to blend in with the tundra. During harsh winter conditions, they may burrow into the snow for insulation and protection from predators, but they remain active throughout the year.