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squirrel

squirrel, name for small or medium-sized rodents of the family Sciuridae, found throughout the world except in Australia, Madagascar, and the polar regions; it is applied especially to the tree-living species. Tree squirrels range from the size of a mouse to the size of a house cat and vary greatly in color; some Asian tree squirrels are brilliantly patterned. In addition to the tree squirrels, the family includes the ground squirrel, chipmunk, marmot, woodchuck, prairie dog, and flying squirrel.

Tree Squirrel Characteristics and Behavior

The so-called typical tree squirrels are members of the genus Sciurus, with about 40 species distributed throughout forested regions of Eurasia and the Americas. These are day-active animals with slender bodies, sleek, thick fur, and bushy tails. Their coats are black, gray, brown, or reddish above and light-colored below. Light, swift, and agile, tree squirrels leap from branch to branch and scurry up and down trees using their sharp claws to dig into the trunk; they always descend head first. The tail is used as a rudder when the animal leaps and as a parachute when it drops. They have excellent sight, including good color vision. The handlike forepaws are used for holding food. Tree squirrels make nests in holes in trees or on branches. They spend much time on the ground, foraging for fruit, nuts, and insects; they also sometimes eat eggs, young birds, and smaller mammals. Members of many species store food for the winter in holes or buried in the ground; they locate these stores by means of smell. They do not hibernate.

Types of Tree Squirrels

Sciurus species include the Eurasian red squirrel, S.vulgaris, and the North American gray squirrels, fox squirrel, and tufted-eared squirrels. Gray squirrels have tails about as long as the combined head and body length. The eastern gray squirrel, S.carolinensis, common in the eastern half of the United States and extreme southern Canada, is up to 20 in. (51 cm) in total length, 5 in. (13 cm) high at the shoulder, and weighs 1 to 11/2 lb (450–700 grams). It has been introduced in Europe. The western gray squirrel, S.griseus, of the U.S. West Coast, is slightly larger. The fox squirrel, S.niger, is the largest North American squirrel, reaching 29 in. (74 cm) in total length; its head is somewhat square. It displays great variation in its fur color but is commonly light brown. It is found in the eastern half of the United States, excluding the extreme northeast. Although its numbers have been greatly diminished by hunting and clearing, it is still common in some areas. It has also been introduced in city parks in western states. The tufted-eared squirrels, also called tassel-eared, or Abert, squirrels, are very distinctive, with tall plumes of hair on their ears. They inhabit yellow pine forests of the Colorado Plateau. One variety, the Kaibab squirrel, is found only on the northern rim of the Grand Canyon. North American red squirrels, also known as pine squirrels and chickarees, are species of the genus Tamiasciurus. They are small and noisy, about 12 in. (30 cm) long and 31/2 in. (9 cm) high, weighing 5 to 10 oz (140–280 grams). They are found in the pine forests of Alaska, Canada, and the N and W United States. Other genera of arboreal squirrels are found mostly in Africa, S and SE Asia, and Central and South America.

Classification

Squirrels are classified in the phylum Chordata, subphylum Vertebrata, class Mammalia, order Rodentia, family Sciuridae.

Bibliography

See D. MacClintock, Squirrels of North America (1970).

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Sciuridae

Sciuridae (squirrels; order Rodentia, suborder Sciuromorpha) A family of diurnal, mainly arboreal but also terrestrial or burrowing rodents, in which the tail is fully haired and often bushy, there are four digits on the fore limbs and five on the hind limbs, all with sharp claws, and the eyes and ears are relatively large. The cheek teeth are low-crowned and lophodont. Squirrels are distributed widely in Eurasia and N. America, but do not occur in Australasia or Madagascar. In addition to the familiar arboreal squirrels (e.g. Sciurus vulgaris, red squirrel of Eurasia and Petaurista alborufa, red-and-white giant flying squirrel of southern Asia) the family includes ground squirrels (e.g. Tamias and Eutamias, N. American chipmunks, Cynomys ludovicianus and C. leucurus, prairie dogs of N. America, and Marmota marmota, marmot or woodchuck). Squirrels reached S. America during the Pleistocene but are not found in the southern part of the continent. There are 47 genera, with about 250 species.

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squirrel

squir·rel / ˈskwərl/ • n. an agile tree-dwelling rodent (Sciurus and other genera, family Sciuridae) with a bushy tail, typically feeding on nuts and seeds. ∎  a related rodent of this family (see ground squirrel, flying squirrel). ∎  the fur of the squirrel. • v. (squirreled , squirreling ) 1. [tr.] (squirrel something away) hide money or something of value in a safe place: the money was squirreled away in foreign bank accounts. 2. [intr.] move in an inquisitive and restless manner: they were squirreling around in the woods in search of something. ORIGIN: Middle English: shortening of Old French esquireul, from a diminutive of Latin sciurus, from Greek skiouros, from skia ‘shade’ + oura ‘tail.’ Current verb senses date from the early 20th cent.

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squirrel

squirrel Any of numerous species of primarily arboreal, diurnal rodents found throughout the world. Species of Eurasia and the Americas, such as the common grey squirrel, red squirrel, and flying squirrels, are the best known. Most species feed on nuts, seeds, fruit, insects. Most have short fur and characteristically bushy tails. Family Sciuridae.

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squirrel

squirrel XIV. Aphetic — AN. esquirel, OF. esquireul, escureul (mod. écureuil) :- Rom. *scūriōlus, dim. of *scúrius, for L. sciūrus — Gr. skíouros
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squirrels

squirrels See ANOMALURIDAE; SCIURIDAE.

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squirrel

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