Prairie dog and Clark in 1804. Lewis described it in more detail in 1806, calling it the "barking squirrel". On average, these stout-bodied rodents will grow to be between long, including the short tail, and weigh between . Sexual dimorphism in body mass in the prairie dog varies 105 to 136% between the sexes. Among the species, black-tailed prairie dogs tend to be the least sexually dimorphic, and white-tailed prairie dogs tend to be the most sexually dimorphic. Sexual dimorphism peaks during weaning, when the females lose weight and the males start eating more, and is at its lowest when the females
Mexican prairie dog get away quickly. Mexican prairie dogs live in excavated colonies, referred to as "towns", which they dig for shelter and protection. A typical town has a funnel-like entrance that slants down into a corridor up to long, with side chambers for storage and nesting. Towns can contain hundreds of animals, but generally have fewer than 50, with a single alpha male. Sometimes, spotted ground squirrels or burrowing owls share the burrow with its rightful owners. In 1956, the Mexican prairie dog was reported as occurring in Coahuila, Nuevo León, and San Luis Potosí. By the 1980s, it had disappeared from