Baby Prairie Dog, Badlands National Park, South Dakota
Other than bison, the one thing I knew I was guaranteed to find in the Badlands were prairie dogs. They are virtually all over the place. And this time of year it is baby season. This little guy was mimicking a whistle call often performed by the adult prairie dogs. To alert others in the town of possible danger, they will throw their heads back and whistle the alarm.
Nikon D800 with Nikkor 200-400mm lens (at 400mm) ISO 400, f/4 at 1/320th of a second