In this Monday, October 5, 2015, photo, a black-footed ferret belts out warning during a release of 30 ferrets by the U.S. Fish and Wildlife Service at the Rocky Mountain Arsenal National Wildlife Refuge in Commerce City, Colo. Dozens of slinky, ferocious and rare ferrets are settling in and making babies at a wildlife refuge outside Denver one year after they were released there. (Photo by David Zalubowski/AP Photo)
