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desert bighorn sheep
Desert bighorn sheep (''Ovis canadensis nelsoni'') is a subspecies of bighorn sheep (''Ovis canadensis''), that is native to the deserts of the Southwestern United States and Northwestern Mexico.
The trinomial of this species commemorates the American naturalist Edward William Nelson (1855–1934). The characteristics and behavior of desert bighorn sheep generally follow those of other bighorn sheep, except for adaptation to the lack of water in the desert. They can go for extended periods of time without drinking water.
==Distribution==
The range of Desert bighorn sheep includes habitats in the Mojave Desert, Colorado Desert, and Sonoran Desert.
Populations of the desert bighorn sheep declined drastically with European colonization of the American Southwest beginning in the 16th century. These declines were followed by a period of population stabilization ascribed to conservation measures. As of 2004, desert bighorn sheep numbers remain extremely low, although the overall population trend has increased since 1960.
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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