squirrel, Any of about 260 species in 50 genera (family Sciuridae) of mostly diurnal rodents found almost worldwide. Many species are arboreal; some are terrestrial. All species have strong hind legs and a hairy tail. They vary widely in colour and form and range in total length from the 4-in. (10-cm) African pygmy squirrel to the giant squirrels of Asia, about 35 in. (90 cm) long. Tree dwellers live in a tree hollow or nest, and most are active year-round. Ground dwellers live in burrows, and many become dormant in winter (hibernate) or summer (estivate). Most species are primarily vegetarian and are fond of seeds and nuts; some eat insects or supplement their diet with animal protein. See also chipmunk; flying squirrel; ground squirrel; marmot; prairie dog.
squirrel summary
Explore the general characteristics of squirrels
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flying squirrel Summary
Flying squirrel, (tribe Pteromyini), any of more than 50 species of gliding squirrels. Three species are North American, two live in northern Eurasia, and all others are found in the temperate and tropical forests of India and other parts of Asia. Although these rodents do not fly, glides of up to
ground squirrel Summary
Ground squirrel, any of 62 species of long-bodied terrestrial rodents that are active during the day and have short legs, strong claws, small rounded ears, and a short or moderately long tail. Colour varies widely among species from gray, tawny, or pale brown to olive, reddish, or very dark brown.