In this photo you can see the black tip on the tail which gives them their official name of Black-tailed Prairie Dog. There are three other species of Prairie Dog in the United States but the Black-tailed has the most extensive range. In the Badlands, park rangers have reintroduced Black-footed Ferrets, a predator which specializes in Prairie Dogs. Ferrets are only out at night so most visitors never see them. However, park information signs report that the Ferrets are doing well and multiplying. Other Prairie Dog predators include hawks, eagles, coyotes, badgers, and rattlesnakes.