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Eastern indigo snake
The eastern indigo snake (''Drymarchon couperi'') is a species of large nonvenomous colubrid snake native to the Eastern United States. It is of note as being the longest native snake species in the U.S.
==Description==
The eastern indigo snake has even blue-black dorsal and lateral scales, with some specimens having a reddish-orange to tan color on the throat, cheeks, and chin. This snake received its common name from the glossy iridescent ventral scales which can be seen as blackish-purple in bright light. This smooth-scaled snake is considered to be the longest native snake species in the United States. The longest recorded specimen measured . Unlike many snakes, mature male indigo snakes are slightly larger than females. A typical mature male measures , with a reported average of , and weighs , reportedly averaging . Meanwhile, a mature female typically measures around in length, averaging , and weighs , averaging .〔(Eastern Indigo Snake ). The Orianne Society. Retrieved on 2012-11-30.〕〔Hyslop, N. L., Cooper, R. J., & Meyers, J. M. (2009). ''Seasonal shifts in shelter and microhabitat use of Drymarchon couperi (eastern indigo snake) in Georgia''. Journal Information, 2009(3).〕 In specimens over , these snakes can weigh up to .〔James C. Godwin. (Eastern Indigo Snake Fact Sheet ). alaparc.org〕 Although the indigo snake is similar in average body mass, extremely large specimens of the bulky, co-occurring venomous eastern diamondback rattlesnake can outweigh them.
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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