In July, the Mount Rainier white-tailed ptarmigan was officially listed as threatened by the U.S. Fish and Wildlife Service ...

s high-alpine environment. The white-tailed ptarmigan also exhibits feathers on its feet that serve as a sort of snowshoe. Male and female birds can be distinguished from each other during the summer ...

The smallest bird in the grouse family, the white-tailed ptarmigan is also one of the few animals that lives on alpine mountaintops throughout its entire life. Every part of this ptarmigan is adapted ...