Caribou People - PeterMather
Ice cave near Kluane National Park.
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Porcupine Caribou Herd ~ Rangifer tarandus granti ~ are a barren ground caribou herd numbering over 179,000 members ~ they winter in the Yukon, Alaska and Northwest Territories ~ During their annual spring migration to their calving grounds in Canada's Ivvavik National Park and Alaska's Arctic National Wildlife Refuge ~ they are thought to have the longest land mammal migration in the world ~ aerial images of migration during spring

CARIBOUPEOPLE3longest mammal migration caribou ANWR Arctic Refuge environmental mammal ungulates barren ground Gwich'in subsistence Alaska Yukon Canada North America porcupine spring melt break up aerial