KEN M. HIGHFILL / SCIENCE PHOTO LIBRARY KEN M. HIGHFILL / SCIENCE PHOTO LIBRARY
Black-tailed prairie dogs (Cynomys ludovicianus) standing alert on an area of vegetation. Prairie dogs are very sociable animals, living in large underground colonies comprising several family groups. When a predator is seen, a prairie dog will raise an alarm call, alerting its neighbours. The prairie dogs that hear the cry quickly return to their burrows for protection. They inhabit plains and grassland from Canada to Mexico, eating grasses and other low plants.
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