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eastern gray squirrel
''Sciurus carolinensis'', common name eastern gray squirrel or grey squirrel depending on region, is a tree squirrel in the genus ''Sciurus''. It is native to eastern North America, but has since been introduced to European regions.
==Distribution==
''Sciurus carolinensis'' is native to the eastern and midwestern United States, and to the southerly portions of the eastern provinces of Canada. The native range of the eastern gray squirrel overlaps with that of the fox squirrel (''Sciurus niger''), with which it is sometimes confused, although the core of the fox squirrel's range is slightly more to the west. The eastern gray squirrel is found from New Brunswick to Manitoba, south to East Texas and Florida. Breeding eastern gray squirrels are found in Nova Scotia, but whether this population was introduced or came from natural range expansion is not known. It has also been introduced into Ireland, Britain, Italy, South Africa, and Australia (where it was extirpated by 1973).〔 Eastern grey squirrels in Europe are a concern because they have displaced some of the native squirrels there.
A prolific and adaptable species, the eastern gray squirrel has been introduced to, and thrives in, several regions of the western United States. The gray squirrel is an invasive species in Britain; it has spread across the country and has largely displaced the native red squirrel, ''S. vulgaris''. In Ireland, the red squirrel has been displaced in several eastern counties, though it still remains common in the south and west of the country.〔Carey, M., Hamilton, G., Poole, A., and Lawton, C. (2007) (The Irish Squirrel Survey 2007 ). COFORD, Dublin, ISBN 1902696603〕 That such displacement might happen in Italy is of concern, and gray squirrels might spread from Italy to other parts of mainland Europe.〔(【引用サイトリンク】title=Summary (of Bertolino S., Lurz. P.W.W., Rushton S.P. 2006, DIVAPRA Entomology & Zoology) )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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