Donald M. Jones / Black-tailed Prairie Dog (Cynomys ludovicianus) group, South Dakota

Donald M. Jones / Black-tailed Prairie Dog (Cynomys ludovicianus) pair greeting, South Dakota

Donald M. Jones / Black-tailed Prairie Dog (Cynomys ludovicianus) pair greeting, South Dakota

Yva Momatiuk & John Eastcott / Black-tailed Prairie Dog (Cynomys ludovicianus) on alert, Theodore Roosevelt National Park, North Dakota

Donald M. Jones / Black-tailed Prairie Dog (Cynomys ludovicianus) standing and barking, eastern Montana

Pete Oxford / Black-tailed Prairie Dog (Cynomys ludovicianus) looking for danger, Devil's Tower National Monument, Wyoming

Konrad Wothe / Black-tailed Prairie Dog (Cynomys ludovicianus) pair interacting, North America

Shin Yoshino / Black-tailed Prairie Dog (Cynomys ludovicianus) pair touching noses for identification, Colorado

Jim Brandenburg / Black-tailed Prairie Dog (Cynomys ludovicianus) trio at burrow entrance, South Dakota

Yva Momatiuk & John Eastcott / Black-tailed Prairie Dog (Cynomys ludovicianus) eating grass in summer, Devil's Tower National Park, Wyoming

Konrad Wothe / Black-tailed Prairie Dog (Cynomys ludovicianus) alert pair, North America

Jim Brandenburg / Black-tailed Prairie Dog (Cynomys ludovicianus) town with animals near burrows, South Dakota