The Porcupine Caribou Herd is a migratory group of caribou that primarily inhabits the northeastern part of Alaska and northwestern Canada. This herd is known for its long migration route, traveling over 1,500 miles each year between summer and winter ranges. The herd is an important part of the ecosystem, providing food for predators and supporting the local Indigenous communities. The Porcupine Caribou Herd is estimated to number around 200,000 individuals. They are known for their distinctive antlers, which are shed and regrown annually. The herd's migration is closely tied to the seasonal availability of food and calving grounds, particularly in the Arctic National Wildlife Refuge.