Rattlesnake
Rattlesnakes are a group of venomous snakes of the genera Crotalus and Sistrurus[1] of the subfamily Crotalinae (the pit vipers). The scientific name Crotalus is derived from the Greek κρόταλον, meaning "castanet".[2] The name Sistrurus is the Latinized form of the Greek word for "tail rattler" (Σείστρουρος, seistrouros) and shares its root with the ancient Egyptian musical instrument the sistrum, a type of rattle.[3] The 36 known species of rattlesnakes have between 65 and 70 subspecies,[4] all native to the Americas, ranging from southern Alberta, Saskatchewan, and southern British Columbia in Canada to central Argentina.
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