where do caribou live in the us?

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Caribou in the United States live primarily in Alaska, which is home to 32 distinct herds totaling approximately 950,000 animals. They inhabit Arctic tundra, mountain ridges, and boreal forests. A tiny, endangered population of woodland caribou also exists in the southern Selkirk Mountains of Idaho and Washington. 

Key Locations in the U.S.

• Alaska (32 Herds): Caribou are found throughout most of Alaska, including the Arctic National Wildlife Refuge (Porcupine herd) and the National Petroleum Reserve (Western Arctic herd).
• National Parks (Alaska):
  Major populations are monitored in Denali National Park & Preserve, Wrangell-St. Elias National Park & Preserve, and Gates of the Arctic National Park & Preserve.
Idaho/Washington (Southern Selkirk Mountains): A critically endangered population of mountain caribou, often numbering fewer than 15 individuals, inhabits the border region, extending into British Columbia, Canada. 

Habitat and Behavior

• Summer: They prefer treeless tundra and mountains for feeding and to gain relief from insects.
• Winter: Many herds move to boreal forests (taiga), where they use their large, splayed feet to dig through snow for lichen.
• Migration: Some herds, such as the Porcupine herd, undertake massive migrations, while others (like boreal woodland caribou) are more sedentary.
• Appearance: Both male and female caribou grow antlers. 

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Status
While populations in Alaska are generally robust, the southern Selkirk population in the contiguous U.S. is considered critically endangered. 

• Woodland Caribou (Rangifer tarandus caribou) | U.S. Fish & Wildlife Service

  Canning River caribou. A small group of caribou moving up the Canning River's braids. Aug 21, 2016. Katrina Liebich. Proposed Rule...

  

  U.S. Fish and Wildlife Service (.gov)

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