Black-footed ferrets are nocturnal, leaving their burrows at night to hunt prairie dogs. Photo: Elisa Dahlberg / USFWS. Tweeted by the US Fish & Wildlife Service 3/4/17.
Mealtime involves certain entanglements for a great blue heron at Ridgefield National Wildlife Refuge in Washington. But the garter snake is destined to be dinner. The image took first place in Ridgefield Refuge’s 2012 photo contest. Photo by Gary Davenport. From the US Fish & Wildlife website.
A male mountain bluebird pauses for a moment after catching a grasshopper. All is clear, so he quickly feeds one of the young bluebirds through the nest cavity hole and sets off to find another one. Photo by Tom Koerner/USFWS. Taken 6/25/17 and posted on Flickr by the US Fish & Wildlife Service.
Bald eagle on Seedskadee National Wildlife Refuge Photo by Tom Koerner/USFWS. Taken 6/28/17 and posted on Flickr by the US Fish & Wildlife Service.
While not rare, pine martens can be hard to photograph. This one was spotted at Yellowstone National Park. Photo by Jacob W. Frank. Tweeted by the US Department of the Interior, 5/23/17.