A Prairie Falcon puffs up against the cold on a chilly morning at the Rocky Mountain Arsenal National Wildlife Refuge. Tweeted by the US Department of the Interior, 12/5/16.
Some winter commutes are wet. And cold. This mule deer is headed for a drier destination! Posted on Facebook by the US Department of the Interior, 11/22/16.
This mountain bluebird rides the storm out. Stay warm friends! Photo: Tom Koerner/USFWS. Tweeted by the US Department of the Interior, 11/25/16.
Sunset glows purple over snow at Crater Lake National Park. Photo by John Dale. Tweeted by the US Department of the Interior, 12/4/16.