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 than black-tailed prairie dogs, they are considered to be more social than the white-tailed prairie dogs. Studies have shown female Gunnison's prairie dogs are far more likely to engage in friendly social contact with other prairie dogs, and males are more likely to create conflict. With exception of two species, the black-tailed and Mexican, prairie dogs hibernate. During the winter, the Gunnison's prairie dog stays underground for long periods of time without food or water, using physiological adaptations to control their metabolism. Their bodies also rely on their stored body fat during hibernation. After hibernation, they become active again around