The Mohave Ground Squirrel occupies a relatively tiny part of the Mohave Desert and is rarely seen since it spends more than half the year underground in a burrow. Estivation, the hot-weather equivalent of hibernation, and hibernation last from mid-summer through winter, which lets them avoid the hottest, driest, and coldest months, when the least food is available. Learn more about the Spermophilus mohavensis, more commonly known as a Mohave Ground Squirrel, in this easy-to-read species overview by the Smithsonian's National Museum of Natural History.