The ptarmigan is a medium-sized bird found in cold, mountainous regions of the Northern Hemisphere, including parts of North America, Europe, and Asia. It is well-adapted to its environment, with feathers that change color with the seasons—white in winter for camouflage against snow and brown or gray in summer to blend in with rocks and vegetation. Ptarmigans are part of the grouse family and are known for their distinctive rounded bodies and short tails. They primarily feed on a diet of leaves, berries, and seeds. These birds are also known for their unique ability to thrive in harsh climates, making them a fascinating subject of study in ornithology.