Scientific name.........................................................Common name
Agkistrodon bilineatus bilineatus
Common Cantil
Agkistrodon bilineatus howardgloydi
..Gloyd's Cantil
Agkistrodon bilineatus lemosespinali................................................................
Agkistrodon bilineatus russeolus
.Yucatan Cantil
Agkistrodon taylori
Ornate Cantil
Agkistrodon contortrix contortrix
Southern Copperhead
Agkistrodon contortrix lacticinctus
.Broad-banded Copperhead
Agkistrodon contortrix mokasen
..Northern Copperhead
Agkistrodon contortrix phaeogaster
.Osage Copperhead
Agkistrodon contortrix pictigaster
..Trans-pecos Copperhead
Agkistrodon piscivorus piscivorus
..Eastern Cottonmouth
Agkistrodon piscivorus conanti
Florida Cottonmouth
Agkistrodon piscivorus leucostoma
Western Cottonmouth
Atropoides nummifer mexicanus**
Atropoides nummifer nummifer**
Common Jumping Pitviper
Atropoides nummifer occiduus**
Atropoides olmec**
Olmec Pitviper
Atropoides picadoi**
Picado's Pitviper
Bothriechis aurifer
..Yellow-blotched Palm Pitviper
Bothriechis bicolor
.Guatemalan Palm Pitviper
Bothriechis lateralis
Side-striped Palm Pitviper
Bothriechis marchi
March's Palm Pitviper
Bothriechis nigroviridis nigroviridis
Black-speckled Palm Pitviper
Bothriechis nigroviridis aurifer
Bothriechis nigroviridis marchi
Bothriechis rowleyi
.Rowley's Palm Pitviper
Bothriechis schlegelii
.Eyelash Viper
Bothriopsis albocarinata
Bothriopsis bilineata bilineata
Two-striped Forest Pitviper
Bothriopsis bilineata smaragdina
Bothriopsis medusa
Bothriopsis oligolepis
Bothriopsis peruviana
Bothriopsis punctata
Bothriopsis taeniata taeniata
Bothriopsis taeniata lichenosa
Bothrops alternatus
.Urutu
Bothrops ammodytoides
..Patagonian Lancehead
Bothrops andianus
.Andean Lancehead
Bothrops asper
.Terciopelo
Bothrops atrox
Fer-de-lance or Common Lancehead
Bothrops barnetti
.Barnett's Lancehead
Bothrops brazili
.Brazil's Lancehead
Bothrops campbelli
Dusky Lancehead
Bothrops caribbaeus
Saint Lucia Lancehead
Bothrops colombianus
.Colombian Lancehead
Bothrops colombiensis
Bothrops cotiara
Cotiara
Bothrops erythromelas
.Caatinga Lancehead
Bothrops fonsecai
Fonseca's Lancehead
Bothrops iglesiasi
..Sertao Lancehead
Bothrops insularis
.Golden Lancehead
Bothrops itapetiningae
..Sao Paulo Lancehead
Bothrops jararaca
Jararaca
Bothrops jararacussu
.Jararacussu
Bothrops jonathani
Bothrops lanceolatus
Martinique Lancehead
Bothrops leucurus
..White-tailed Lancehead
Bothrops lojanus
...Lojan Lancehead
Bothrops marajoensis
.Marajo Lancehead
Bothrops microphthalmus
Small-eyed Lancehead
Bothrops moojeni
Brazilian Lancehead
Bothrops neuwiedi bolivianus
Bothrops neuwiedi diporus
Bothrops neuwiedi goyazensis
Bothrops neuwiedi lutzi
Bothrops neuwiedi matogrossensis
Bothrops neuwiedi meridionalis
Bothrops neuwiedi neuwiedi
Neuwied's Lancehead
Bothrops neuwiedi paranaensis
Bothrops neuwiedi pauloensis
Bothrops neuwiedi piauhyensis
Bothrops neuwiedi pubescens
Bothrops neuwiedi urutu
Bothrops pictus
Desert Lancehead
Bothrops pirajai
.Piraja's Lancehead
Bothrops pradoi
.Prado's Lancehead
Bothrops sanctaecrucis
Bolivian Lancehead
Bothrops venezuelensis
..Venezuelan Lancehead
Bothrops xanthogrammus
..Cope's Lancehead
Calloselasma rhodostoma
Malayan pitviper
Cerrophidion barbouri
Cerrophidion godmani
Godman's Montane Pitviper
Cerrophidion petlalcalensis
Cerrophidion tzotzilorum
Crotalus adamanteus
..Eastern Diamondback Rattlesnake
Crotalus aquilus
.Queretaran Dusky rattlesnake
Crotalus atrox
Western Diamondback Rattlesnake
Crotalus basiliscus
Mexican West Coast Rattlesnake
Crotalus catalinensis
Santa Catalina Rattlesnake
Crotalus cerastes cerastes
Mojave Sidewinder
Crotalus cerastes cercobombus
..Southern Sidewinder
Crotalus cerastes laterorepens
Colorado Desert Sidewinder
Crotalus durissus cascavella
Crotalus durissus collilineatus
Crotalus durissus culminatus
.Northwestern Neotropical Rattlesnake
Crotalus durissus dryinas
Crotalus durissus durissus
..Neotropical rattlesnake
Crotalus durissus marajoensis
Crotalus durissus neoleonensis
Crotalus durissus ruruima
Crotalus durissus terrificus
.South American rattlesnake
Crotalus durissus totonacus
..Totonacan rattlesnake
Crotalus durissus trigonicus
Crotalus durissus tzabcan
Yucatan Neotropical Rattlesnake
Crotalus enyo enyo
.Baja Rattlesnake
Crotalus enyo cerralvensis
..Cerralvo Island rattlesnake
Crotalus enyo furvus
Rosario rattlesnake
Crotalus exsul
.Cedros Island diamond rattlesnake
Crotalus horridus horridus
..Timber Rattlesnake
Crotalus horridus atricaudatus
Canebrake rattlesnake
Crotalus intermedius intermedius
..
Mexican Small-headed Rattlesnake
Crotalus intermedius gloydi
Crotalus intermedius omiltemanus
Crotalus lannomi
..Autlan Rattlesnake
Crotalus lepidus lepidus
..Mottled rock rattlesnake
Crotalus lepidus klauberi
.Banded rock rattlesnake
Crotalus lepidus maculosus
Crotalus lepidus morulus
Tamaulipan rock rattlesnake
Crotalus mitchellii angelensis
Crotalus mitchelli mitchelli
.. San Lucan speckled rattlesnake
Crotalus mitchellii muertensis
Crotalus mitchelli pyrrhus
.Southwestern speckled rattlesnake
Crotalus mitchelli stephensi
..Panamint speckled rattlesnake
Crotalus molossus molossus
..Northern Black-tailed Rattlesnake
Crotalus molossus estebanensis
.Esteban Black-tailed Rattlesnake
Crotalus molossus nigrescens
Mexican Black-tailed Rattlesnake
Crotalus molossus oaxacus
Oaxacan Black-tailed Rattlesnake
Crotalus polystictus
.Mexican Lance-headed Rattlesnake
Crotalus pricei pricei
Twin-spotted Rattlesnake
Crotalus pricei miquihuanus
Crotalus pusillus
Crotalus ruber elegans
Crotalus ruber lorenzoensis
Crotalus ruber lucasensis
.San Lucan diamondback rattlesnake
Crotalus ruber monserratensis
Crotalus ruber ruber
.Red Diamondback Rattlesnake
Crotalus scutulatus scutulatus
.Mojave rattlesnake
Crotalus scutulatus salvini
...Huamantlan rattlesnake
Crotalus stejnegeri
Long-tailed rattlesnake
Crotalus tigris
.Tiger rattlesnake
Crotalus tortugensis
Tortuga Island Rattlesnake
Crotalus transversus
Cross-banded Mountain Rattlesnake
Crotalus triseriatus aquilus
Crotalus triseriatus armstrongi
Crotalus triseriatus triseriatus
Mexican Dusky Rattlesnake
Crotalus unicolor
Aruba Island rattlesnake
Crotalus vegrandis
.Uracoan rattlesnake
Crotalus viridis abyssus
..Grand Canyon Rattlesnake
Crotalus viridis caliginis
..Coronado Island Rattlesnake
Crotalus viridis cerberus
..Arizona black Rattlesnake
Crotalus viridis concolor
..Midget faded Rattlesnake
Crotalus viridis helleri
.Southern Pacific Rattlesnake
Crotalus viridis lutosus
Great Basin Rattlesnake
Crotalus viridis nuntius
..Hopi Rattlesnake
Crotalus viridis oreganus
.Northern Pacific Rattlesnake
Crotalus viridis viridis
.Prairie Rattlesnake
Crotalus willardi amabilis
Crotalus willardi meridionalis
Crotalus willardi willardi
...Arizona ridge-nosed Rattlesnake
Crotalus willardi obscurus
.New Mexico ridge-nosed Rattlesnake
Crotalus willardi silus
..Chihuahuan ridge-nosed Rattlesnake
Deinagkistrodon acutus
..The Hundred-pacer
Gloydius blomhoffi blomhoffi
Japanese Mamushi
Gloydius blomhoffi brevicaudus--------
Gloydius blomhoffii dubitatus
Gloydius blomhoffii siniticus---------------Yangtze Mamushi
Gloydius halys affinis
Gloydius halys boehmei
Gloydius halys caraganus
Gloydius halys caucasicus
Gloydius halys cognatus
Gloydius halys halys
..Siberian Pitviper
Gloydius halys liupanensis
Gloydius halys intermedius
Gloydius himalayanus
.Himalayan Pitviper
Gloydius intermedius caucasicus
Gloydius intermedius intermedius
Asian Pitviper
Gloydius intermedius stejnegeri
Gloydius monticola
Gloydius saxatilis
Gloydius shedaoensis
Gloydius strauchi
Gloydius tsushimaensis
Gloydius ussuriensis
Hypnale hypnale
..Indian hump-nosed Viper
Hypnale nepa
.Sri Lankan hump-nosed Viper
Hypnale walli
.Wall's hump-nosed viper
Lachesis muta muta
..Amazonian Bushmaster
Lachesis muta noctivaga
Lachesis muta rhombeata
..Atlantic Coastal Bushmaster
Lachesis melanocephala
Black-headed Bushmaster
Lachesis stenophrys
Central American Bushmaster
Ophryacus melanurus
Ophryacus undulatus
..Mexican Horned Viper
Ovophis chaseni
Ovophis monticola convictus
Ovophis monticola monticola
Mountain Pitviper
Ovophis monticola makazayazaya
Ovophis monticola orientalis
Ovophis monticola zhaokentangi
Ovophis monticola zayuensis
Ovophis okinavensis
..Himehabu
Ovophis tonkinensis
Porthidium dunni
...Dunn's hognose Viper
Porthidium hespere
.Western Hognose Viper
Porthidium hyoprora
.Amazonian Hognose Viper
Porthidium lansbergii arcosae
Porthidium lansbergii hutmanni
Porthidium lansbergii lansbergii
Lansberg's hognose viper
Porthidium lansbergii rozei
Porthidium melanurum
Black-tailed Viper
Porthidium nasutum
Rainforest Hognose Viper
Porthidium ophryomegas
.Slender Hognose Viper
Porthidium volcanicum
Porthidium yucatanicum
.Yucatan Hognose Viper
Protobothrops elegans
Protobothrops flavoviridis flavoviridis
Habu
Protobothrops flavoviridis tinkhami
Protobothrops jardani bouretii
Protobothrops jardani jardani
Protobothrops jardani meridionalis
Protobothrops jardani xanthomelas
Protobothrops kaulbacki
Protobothrops mucrosquamatus
..Chinese habu
Protobothrops strigatus
Protobothrops xiangchengensis
Sistrurus catenatus catenatus
.Eastern Massasauga
Sistrurus catenatus edwardsi
..Desert Massasauga
Sistrurus catenatus tergeminus
Western Massasauga
Sistrurus miliarius miliarius
.Carolina pigmy Rattlesnake
Sistrurus miliarius barbouri
.Dusky pigmy Rattlesnake
Sistrurus miliarius streckeri
..Western Pigmy rattlesnake
Sistrurus ravus ravus
Mexican Pigmy rattlesnake
Sistrurus ravus brunneus
Sistrurus ravus exiguus
Sistrurus ravus lutescens
Trimeresurus albolabris albolabris
White-lipped tree Viper
Trimeresurus albolabris insularis
Trimeresurus albolabris septentrionalis
Trimeresurus andersonii
Trimeresurus borneensis
..Bornean Pitviper
Trimeresurus brongersmai
Trimeresurus cantori
Trimeresurus cornutus
Trimeresurus erythrurus
.Red-tailed Bamboo Viper
Trimeresurus fasciatus
Trimeresurus flavomaculatus flavomaculatus
Philippine Pitviper
Trimeresurus flavomaculatus halieus
Trimeresurus gracilis
Trimeresurus gramineus
.Green tree viper
Trimeresurus hageni
Hagen's Bamboo Viper
Trimeresurus huttoni
Trimeresurus kanburiensis
Trimeresurus karanshahi
Trimeresurus labialis
Trimeresurus macrolepis
Trimeresurus macrops
Big-eyed Bamboo Viper
Trimeresurus malabaricus
Trimeresurus malcolmi
Trimeresurus mangshanensis****
Trimeresurus mcgregori
...McGregors Pitviper
Trimeresurus medoensis
Trimeresurus popeiorum barati
Trimeresurus popeiorum popeiorum
Pope's Tree Viper
Trimeresurus popeiorum sabahi
Trimeresurus puniceus
..Leaf-nosed Pitviper
Trimeresurus purpureomaculatus
.Purple-spotted Bamboo Viper
Trimeresurus schultzei
Trimeresurus stejnegeri chenbihuii
Trimeresurus stejnegeri kodairai
Trimeresurus stejnegeri makii
Trimeresurus stejnegeri stejnegeri
Chinese Bamboo Viper
Trimeresurus sumatranus
Sumatran Pitviper
Trimeresurus tibetanus
Trimeresurus tokarensis
Trimeresurus trigonocephalus
.Sri Lankan Bamboo Viper
Trimeresurus venustus
..Kanburi Bamboo Viper
Trimeresurus yunnanensis
Tropidolaemus huttoni
Tropidolaemus wagleri alboviridis
Tropidolaemus wagleri subannulatus
Tropidolaemus wagleri wagleri
Wagler's Pitviper
**these species sometimes are placed in the Genus Porthidium
**** sometimes placed in Genus Ermia
