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

David Welling / Utah Prairie Dog (Cynomys parvidens) standing on watch outside their burrow. Bryce Canyon National Park, Utah, USA, August.

Charlie Summers / Three Western Black-tailed Prairie Dogs (Cynomys ludovicianus) at entrance to burrow. Cheyenne River drainage south of Hot Springs, South Dakota, USA

John Cancalosi / Blacktail Prairie Dog (Cynomys ludovicianus) engaging in Jump-yip behavior - A strong arch of the back or "jump" followed by a shrill "yip" - Thought to occur when a predator has left the area and in...

Charlie Summers / Black-tailed Prairie dog (Cynomys ludovicianus) on hind legs, emitting territorial call, Downtown Parker, Colorado, USA, North America

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

Nigel Bean / Black tailed prairie dogs at burrow entrance{Cynomys ludovicianus} Colorado, USA