Ptarmigans are medium-sized birds found in cold, mountainous regions, particularly in the Arctic and subarctic areas. They belong to the grouse family and are well-adapted to their harsh environments, with feathered feet that help them walk on snow. These birds are known for their remarkable ability to change plumage color with the seasons. In summer, ptarmigans have brown or gray feathers that blend with the rocky terrain, while in winter, they turn white to camouflage against the snow. This adaptation helps them avoid predators and survive in extreme conditions.