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Ord's kangaroo rat
Ord's kangaroo rat, ''Dipodomys ordii'', is a kangaroo rat native to western North America, specifically the Great Plains and the Great Basin, with its range extending from extreme southern Canada to central Mexico.
Ord's kangaroo rat has a fifth toe on its hind feet, which distinguishes it from ''Dipodomys elator''. It is bicolored with gold-brown dorsal hair and a white stomach. It has a long tail with a bushy tip, and is dark dorsally and ventrally with a white lateral stripe. Its hind feet are modified for jumping, and exceed 35 mm in length, and its total length exceeds 240 mm. Its tail is usually less than 160 mm, distinguishing it from ''D. elator'' (which exceeds 160 mm).
Though a common species in the United States, the population in Canada is considered endangered.
==Taxonomy==
The currently accepted scientific name for Ord's kangaroo rat is ''Dipodomys ordii'' Woodhouse. It belongs to the family Heteromyidae, kangaroo rats and mice. Hall〔Hall, E. Raymond. 1981. The mammals of North America. 2nd ed. Vol. 2. New York: John Wiley and Sons〕 listed 35 subspecies, but Kennedy and Schnell reported many of these subspecies are probably not legitimate since they were based on the assumption of little sexual dimorphism in the species. It has now been established that sexual dimorphism within the taxon is considerable.〔
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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