If so, it might be a white-tailed ptarmigan. White-tailed ptarmigans feast on buds, flowers, leave s, and seeds. Sometimes the ptarmigan is hard to see because of their camouflage. The white-tailed ptarmigan weighs up to one pound. It is 11 to 12 inches long.
Ptarmigans spend the winter in the tundra willow patches at timberline.
The ptarmigan chicks hatch in the middle of July. After the ptarmigan chicks hatch the male ptarmigan stays on different feeding grounds. They fly throughout Colorado above 11,000 feet. The white-tailed ptarmigans scientific name is lagopus leucurus . If you see a bush move, it might be a ptarmigan.