Prairie dogs are herbivorous burrowing rodents native to the grasslands of North America. The five species are black-tailed, white-tailed, Gunnison's, Utah, and Mexican prairie dogs. They are a type of ground squirrel. In Mexico, prairie dogs are found primarily in the northern states.

Prairie dogs are named for their habitat and warning call, which sounds similar to a dog's bark. Highly social, prairie dogs live in large colonies or "towns" and collections of prairie dog families that can span hundreds of acres. Family groups of black-tailed and Mexican prairie dogs are called "coteries", while "clans" are used to describe family groups of white-tailed, Gunnison’s, and Utah prairie dogs.

More Info: en.wikipedia.org