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Rock Squirrels are one of the largest members of the Scuridae family, growing to nearly a foot in length, not including their long, bushy tails which are nearly as long as their bodies. In front and on top, their coat is a speckled grayish-brown; in the back, and on the bottom the gray becomes a more mottled brownish black tone. They have a marked light colored ring around their eyes, and pointy ears that project well above their heads. When alarmed they whistle a short, sharp oscillating call.
They are found in the Sonoran Desert, and from Southern Nevada, Utah, Colorado, Oklahoma, and south through Arizona, New Mexico and into Mexico. Rock squirrels live in arid canyons, rocky cliff areas, and boulder piles, but have also been known to burrow in urban or suburban areas under lumber piles or junk cars. They avoid open flats and mountain forest areas.