| The Gray Mouse Opossum is very similar to the Mexican Mouse Opossum in size and shape, but its fur is grayish rather than reddish and its tail is shorter in proportion to its overall length - about the same length as the head and body. These small opossums live in desert scrub and other dry environments and eat insects, figs, and perhaps cactus fruits. They use dry leaves to build small, ball-shaped nests. Nests have been found in small trees, shrubs, holes in cactus plants, and abandoned birds' nests. Like other mouse opossums, the female does not carry her litter of 8 or more young in a pouch. When they are born, after only two weeks in the womb, they crawl to a nipple, fasten on, and stay attached until they have developed enough to move about. There are sometimes more offspring than nipples. If that happens, any neonates who cannot find a nipple die.
Head and Body: 85-149 mm; Tail 93-154 mm
Allen, J.A, 1893. Bulletin of the American Museum of Natural History, 5:235.
Mammal Species of the World (opens in a new window).