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Crotalus willardi
:''Common names: ridge-nosed rattlesnake, Willard's rattlesnake, Willard's rattler〔Wright AH, Wright AA. 1957. Handbook of Snakes. Comstock Publishing Associates. (7th printing, 1985). 1105 pp. ISBN 0-8014-0463-0.〕''
''Crotalus willardi'' is a venomous pit viper species found in the southwestern United States and Mexico. It is the most recent rattlesnake species to be discovered in the United States. Its specific name is in honor of its discoverer, Professor Frank C. Willard.〔(Biographies of People Honored in the Names of the Reptiles and Amphibians of North America )〕 Five subspecies are currently recognized, including the nominate subspecies described here. The Arizona ridge-nosed rattlesnake is the state reptile of Arizona.
==Description==
''C. willardi'' is a rather small rattlesnake with all subspecies measuring one to two feet (30–60 cm) in length. Color patterns are generally a dark brown base with pale or white horizontal striping, but vary slightly between subspecies. The distinctive ridges along each side of its nose, which are a series of upturned scales, are unique to its species and are the origin of its name.
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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