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
Gunnison's prairie dog prairie dog are diurnal. This means they exert the most activity in the early morning and late afternoon. During warm weather, the highest activity levels occur at about 9 a.m., and from 2 p.m. to about an hour before the sun sets. When the temperature starts to cool, they become more active during the day. When it snows or rains, the prairie dogs will stay underground. Their above-ground activities include making social contact, being aware of their surroundings and predators, grooming, burrowing, etc. Their main activity above ground is feeding. Although Gunnison's prairie dogs are considered to be less social