USFWS Mountain Prairie:
White-tailed Ptarmigan in Summer Plummage
USFWS Mountain Prairie:
White-tailed Ptarmigan in Summer Plumage
USFWS Mountain Prairie:
Lone White-tailed Ptarmigan
USFWS Mountain Prairie:
Two White-tailed Ptarmigan
USFWS Mountain Prairie:
White-tailed Ptarmigan on Guanella Pass in Winter
USFWS Mountain Prairie:
White-tailed Ptarmigan Snow Prints
USFWS Mountain Prairie:
White-tailed Ptarmigan on Alert
USFWS Mountain Prairie:
Small White-tailed Ptarmigan in Alpine Climate
USFWS Mountain Prairie:
White-tailed Ptarmigan in Snow