Waterfowl on the Kobuk River, Kobuk Valley National Park, 2015.
A flock of waterfowl, mostly mallards (Anas plathyrhynchos) and scaups (Aythya), rise up from the Kobuk River on a clear September day. Soon they will be gone and the land will seem a little quieter until next spring.
U.S. National Park Service
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