In July, the Mount Rainier white-tailed ptarmigan was officially listed as threatened by the U.S. Fish and Wildlife Service (FWS) under the Endangered Species Act (ESA), 14 years after the Center ...
DESCRIPTION: Adult white-tailed ptarmigan typically grow to 30 to 34 centimeters in length and weigh 345 to 425 grams. The bird is distinguishable from other species of grouse by its perpetually white ...
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