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Agkistrodon bilineatus
Mexican Moccasin
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Agkistrodon contortrix
American Copperhead
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Agkistrodon piscivorus
Cottonmouth
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Agkistrodon taylori
Taylor's Cantil
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Atheris squamiger
Green Bush Viper
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Bitis arietans
Common Puff Adder
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Bitis caudalis
Horned Adder
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Bitis gabonica
East African Gaboon Viper
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Bitis nasicornis
African Nose-horned Viper
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Bitis rhinoceros
African Rhinoceros viper
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Bothriechis schlegeli
Eyelash Palm Pitviper
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Bothriopsis taeniata
Speckled Forest Pitviper
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Bothrops asper
Terciopelo
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Bothrops moojeni
Brazilian Lancehead
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Calloselasma rhodostoma
Malayan Pitviper
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Cerastes cerastes
Desert Horned Viper
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Cerastes gasperettii
Middle Eastern Horned Viper
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Cerastes vipera
Sahara Sand Viper
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Crotalus adamanteus
Eastern Diamondback Rattlesnake
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Crotalus aquilus
Queretaran Dusky Rattlesnake
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Crotalus atrox
Western Diamondback Rattlesnake
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Crotalus catalinensis
Santa Catalina Island Rattleless Rattlesnake
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Crotalus cerastes
Sidewinder
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Crotalus cerberus
Arizona Black Rattlesnake
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Crotalus culminatus
Northwestern Neotropical Rattlesnake
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Crotalus durissus
Neotropical Rattlesnake
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Crotalus durissus unicolor
Aruba Island Rattlesnake
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Crotalus durissus vegrandis
Uracoan Rattlesnake
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Crotalus enyo
Baja California Rattlesnake
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Crotalus horridus
Timber Rattlesnake
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Crotalus lepidus
Rock Rattlesnake
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Crotalus mitchelli
Southwestern Speckled Rattlesnake
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Crotalus molossus
Black-tailed Rattlesnake
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Crotalus oreganus
Western Rattlesnake
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Crotalus polystictus
Mexican Lance-headed Rattlesnake
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Crotalus ruber
Red Diamondback Rattlesnake
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Crotalus scutulatus
Mojave Rattlesnake
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Crotalus viridis
Prairie Rattlesnake
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Crotalus willardi
Ridge-nosed Rattlesnake
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Cryptelytrops albolabris
White-lipped Tree Pitviper
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Cryptelytrops erythrurus
Red-tailed Pitviper
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Cryptelytrops purpureomaculatus
Mangrove Pitviper
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Cryptelytrops venustus
Beautiful Pitviper
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Daboia russelii
Russell's Viper
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Echis carinatus
Common Carpet Viper
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Gloydius intermedius
Siberian Mamushi
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Lachesis muta
Bushmaster
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Lachesis stenophrys
Central American Bushmaster
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Ovophis okinavensis
Okinawan Habu
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Parias sumatranus
Sumatran Pitviper
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Proatheris superciliaris
Lowland Swamp Viper
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Protobothrops jerdoni
Jerdon's Mountain Pitviper
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Protobothrops mangshanensis
Mangshan Pitviper
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Pseudocerastes persicus
Persian Horned Viper
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Sistrurus catenatus
Massasauga
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Sistrurus miliarius
Pygmy Rattlesnake
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Trimeresurus borneensis
Borneo Tree Viper
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Trimeresurus trigonocephalus
Sri Lankan Tree Viper
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Tropidolaemus wagleri
Wagler's Pitviper
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Vipera ammodytes
Nose-horned Viper
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Vipera berus
Common European Adder
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Vipera palaestinae
Palestinian Viper
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Vipera ursinii
Meadow and Karst Vipers
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