ancistrodon conotortrix

Webster's Dictionary (GCIDE)

1.(Zool.) A poisonous American serpent (Ancistrodon conotortrix), closely allied to the rattlesnake, but without rattles; -- called also copper-belly, and red viper. [1913 Webster]

2.A nickname applied to a person in the Northern States who sympathized with the South during the Civil War. [U.S.] [1913 Webster]