Black-tailed prairie dog. Black-tailed prairie dog (Cynomys ludovicianus) peering from its burrow. This rodent is a social animal and lives in a large underground colony comprising several family groups. It inhabits plains and grassland from Canada to Mexico, eating grasses and other low plants. It may reach a length of over 40 centimetres. Photographed at the Arizona-Sonora Desert Museum, Arizona, USA.
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