A group of Ptarmigan birds as they change their plumage from brown to white with the onset of winters in Alaska, United States
Alaska USA Date:1929 Duration:45 sec Sound:NO SOUND
Carpenter -Whitney expedition in Alaska, United States. Ptarmigan birds as they change their brown spring plumage to white winter ones in Alaska, United States. Ptarmigan move about with branches of trees in the foreground.
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