White-tailed ptarmigan (Lagopus leucurus) in summer plumage, San Juan National Forest, Colorado, United States of America, North America

White-tailed ptarmigan (Lagopus leucurus) chick, San Juan National Forest, Colorado, United States of America, North America

White-tailed Ptarmigan (Lagopus leucurus) among wildflowers, Mineral Basin, San Juan National Forest, Colorado, United States of America, North America

White-tailed ptarmigan (Lagopus leucurus) in summer plumage, San Juan National Forest, Colorado, United States of America, North America

White-tailed ptarmigan (Lagopus leucurus) in summer plumage, San Juan National Forest, Colorado, United States of America, North America

White-tailed ptarmigan (Lagopus leucurus) hen among wildflowers, Uncompahgre National Forest, Colorado, United States of America, North America

White-tailed ptarmigan (Lagopus leucurus) hen among wildflowers, Uncompahgre National Forest, Colorado, United States of America, North America

White-Tailed Ptarmigan (Lagopus leucurus) in mixed plumage, Mount Evans, Colorado, United States of America, North America