Spotted Ground Squirrels are among the smallest ground squirrels in North America. They inhabit arid and semi-arid regions of Mexico and the Southwest and are found in scrubland and grassland as far north as Wyoming and Nebraska. Learn more about the Spermophilus spilosoma, more commonly known as a Spotted Ground Squirrel, in this easy-to-read species overview by the Smithsonian's National Museum of Natural History.