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:''Common English names: Santa Catalina Rattlesnake,〔Campbell JA, Lamar WW. 2004. The Venomous Reptiles of the Western Hemisphere. Comstock Publishing Associates, Ithaca and London. 870 pp. 1500 plates. ISBN 0-8014-4141-2.〕 Santa Catalina Island rattlesnake〔(''Crotalus catalinensis'' ) at (San Diego Natural History Museum ). Accessed 11 February 2007.〕 ''Crotalus catalinensis'' is a species of venomous pit viper endemic to Isla Santa Catalina in the Gulf of California just off the east coast of the state of Baja California Sur, Mexico. No subspecies are currently recognized. A relatively small and slender species, its most distinctive characteristic is that it lacks a rattle.〔 ==Description== This species is relatively slender and stunted, growing to a maximum of in length.〔 Its most distinctive feature is its lack of a rattle. The base of the tail, the "button", has degenerated to such an extent that the rattle immediately falls off with each shed instead of forming a new segment, as it does in other species of rattlesnakes. This is widely believed to be a localized adaptation for hunting birds.〔 Of the two distinct color variations, the predominant variant has a light cream-colored base, with reddish-brown blotching down the back, and black and white banding around the tail. The other variant has a much lighter, ash gray color, with darker gray blotching. The banding around the tail is still present. 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「Crotalus catalinensis」の詳細全文を読む スポンサード リンク
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