Any of various venomous New World snakes of the genera Crotalus and Sistrurus, having at the end of the tail a series of loosely attached, horny segments that can be vibrated to produce a rattling or buzzing sound.

• 响尾蛇一种西半球有毒蛇响尾蛇和响尾蛇属其尾端有一串松散，连接的角质肢节，能通过震动发出格格或沉闷的响声