KnowraRattlesnakeLinked fromLinked fromThe 4 pages that link to Rattlesnake, each with the reason it gives.All 4Broader topic 4AposematismBroader topic: Its sound can advertise danger before a close encounter or strike.SnakeBroader topic: The rattle is a conspicuous defensive signal evolved within a snake lineage.ViperidaeBroader topic: Rattlesnakes are a distinctive American group within the viperid subfamily Crotalinae.Pit viperBroader topic: Rattlesnakes are the pit vipers best known for their warning sound.