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
Black-tailed prairie dog previous growing season. As black-tailed prairie dogs receive most of their water from their diet, in years with poor rainfall, the black footed prairie dogs spend more time in torpor. Black-tailed prairie dogs are native to grassland habitats in North America. They inhabit shortgrass prairie, mixed-grass prairie, sagebrush steppe, and desert grassland. Habitat preferences for the black-tailed prairie dog are influenced by vegetative cover type, slope, soil type, and amount of rainfall. Their foraging and burrowing activities influence environmental heterogeneity, hydrology, nutrient cycling, biodiversity, landscape architecture, and plant succession in grassland habitats. Black-tailed prairie dogs inhabit grasslands, including short- and