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 able to come out above ground; they must learn how to separate themselves from their mothers and survive on their own. As soon as the mother is done caring her young, she relocates herself to another burrow, leaving her now-independent young behind. Not too long after, they scatter to other vacant burrows. A high percentage of female Gunnison's prairie dogs settle close to their birth territories for their entire lifetimes, whereas a significantly low percentage of the males stay close to their birth territories for longer than one year. The life span of a Gunnison's prairie dog is generally three