Animal World

Fish, Amphibians, and Reptiles

Which venomous snakes are native to the United States?

Snake Average Length
Eastern diamondback (Crotalus adamateus) 33–65 in (84–165 cm)
Western diamondback (Crotalus atrox) 30–65 in (76–419 cm)
Timber rattlesnake (Crotalus horridus horridus) 32–54 in (81–137 cm)
Prairie rattlesnake (Crotalus viridis viridis) 32–46 in (81–117 cm)
Great Basin rattlesnake (Crotalus viridis lutosus) 32–46 in (81–117 cm)
Southern Pacific rattlesnake (Crotalus viridis helleri) 30–48 in (76–122 cm)
Red diamond rattlesnake (Crotalus ruber ruber) 30–52 in (76–132 cm)
Mojave rattlesnake (Crotalus scutulatus) 22–40 in (56–102 cm)
Sidewinder (Crotalus cerastes) 18–30 in (46–76 cm)
Cottonmouth (Agkistrodon piscivorus) 30–50 in (76–127 cm)
Copperhead (Agkistrodon contortrix) 24–36 in (61–91 cm)
Cantil (Agkistrodon bilineatus) 30–42 in (76–107 cm)
Coral snakes  
Eastern coral snake (Micrurus fulvius) 16–28 in (41–71 cm)


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