Bull Caribou 9/17/2016

From USFWS National Wildlife Refuge System:

Heads up! Bull caribou navigate the Kobuk River at Alaska’s Selawik National Wildlife Refuge (http://bit.ly/2byxQaL). The Western Arctic Caribou Herd, the largest herd in Alaska at 325,000 animals, roams through the refuge seasonally. Photo by U.S. Fish and Wildlife Service