Caribou bull, Alaska.

Denali National Park

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A mature caribou bull standing on the tundra of Denali National Park, Alaska.
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A mature caribou bull standing on the tundra of Denali National Park, Alaska. The caribou shed their antler velvet in fall, and the antlers run red with blood for a few days. (Rangifer tarandus) Photo © copyright by Carl Donohue.

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