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Squirrels are generally small animals, ranging in size from the African pygmy squirrel and least pygmy squirrel at 10–14 cm (3.9–5.5 in) in total length and just 12–26 g (0.42–0.92 oz) in weight, [8] [9] to the Bhutan giant flying squirrel at up to 1.27 m (4 ft 2 in) in total length, [10] and several marmot species, which can weigh 8 kg ...
The best-known genus of tree squirrels is Sciurus, which includes the eastern gray squirrel of North America (introduced to Great Britain in the 1870s), [4] the red squirrel of Eurasia, and the North American fox squirrel, among many others.
The eastern gray squirrel (Sciurus carolinensis), also known, particularly outside of the United States, as simply the grey squirrel, is a tree squirrel in the genus Sciurus. It is native to eastern North America, where it is the most prodigious and ecologically essential natural forest regenerator.
The number of species in the genus is subject to change. In 2005, Thorington & Hoffman- whose taxonomic interpretation is followed by the IUCN website- accepted 28 species in the genus: [a] Genus Sciurus. Sciurus granatensis. Subgenus Sciurus. Allen's squirrel, Sciurus alleni; Arizona gray squirrel, Sciurus arizonensis
The fox squirrel (Sciurus niger), also known as the eastern fox squirrel or Bryant's fox squirrel, [3] is the largest species of tree squirrel native to North America.It is sometimes mistaken for the American red squirrel or eastern gray squirrel in areas where the species co-exist, though they differ in size and coloration.
This species has usually been placed in the genus Spermophilus with about 40 other species. As this large genus is paraphyletic to prairie dogs, marmots, and antelope squirrels, Kristofer Helgen and colleagues have split it into eight genera, placing the thirteen-lined ground squirrel in Ictidomys with two other species.
The southern fox squirrel (Sciurus niger niger) is a close relative of the gray squirrel, which is one of the most common squirrel species in the country, and is considered to be the most variably ...
The red squirrel (Sciurus vulgaris), also called Eurasian red squirrel, is a species of tree squirrel in the genus Sciurus. It is an arboreal and primarily herbivorous rodent and common throughout Eurasia .