The sky is ablaze with color during sunset at the National Bison Range Refuge Complex in Montana. One of three refuges that make up the Bison Range Complex, Ninepipe (pictured here) rests among the prairie potholes of the Mission Valley to serve primarily as a refuge and breeding ground for native birds. Photo by Dave Fitzpatrick. Posted on Tumblr by the US Department of the Interior, 12/9/14.
