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Arizona gray squirrel : ウィキペディア英語版 | Arizona gray squirrel
The Arizona gray squirrel (''Sciurus arizonensis'') is a tree squirrel in the genus ''Sciurus'' endemic to the canyons and valleys surrounded by deciduous and mixed forests in eastern Arizona and northern Mexico. It is threatened by habitat loss. The only other large squirrel that is within its range is Abert's squirrel, which has ear tufts and lives in pine forests. Although they act and look like other gray squirrels, the Arizona gray squirrel is actually more closely related to the fox squirrel. ==Phylogeny and Description== ''Sciurus arizonensis'' is a member of the order Rodentia and the family Sciuridae. It is distinguishable from ''Sciurus aberti'' by its longer flatter skull, broader rostrum, and having only one molar instead of two. ''S. arizonensis'' also has smaller ears with no tufts and a red/black stripe on the underside of their tail. Some sexual dimorphism can be seen in these squirrels, but it varies with some populations having larger males, and other populations having larger females.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Arizona gray squirrel」の詳細全文を読む
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