IUCN Red List assessments
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IUCN Red Lists of Snakes (Serpentes)
Taxonomy and distribution of the family Viperidae
Bibliography of the family Viperidae



IUCN Red List assessments:
Extinct (in recent times): 0 species
Extinct in the Wild: 0 species= 0.0 %
Critically Endangered: 10 species= 2.5 %
Endangered: 29 species= 7.3 %
Vulnerable: 29 species= 7.3 %
Near Threatened: 19 species= 4.8 %
Least Concern: 195 species= 48.9 %
Data Deficient: 25 species= 6.3 %
Not Assessed: 92 species= 23.1 %


Adenorhinos (Udzungwa Short-headed Viper)
Agkistrodon (American Copperheads, Cottonmouths, and Cantils)
Atheris (African Bush Vipers)
Atropoides (Costa Rican Jumping Pitviper)
Azemiops (Asian Mole Vipers)
Bitis (African Adders)
Bothriechis (Palm Pitvipers)
Bothrocophias (Toad-headed Pitvipers)
Bothrops (American Lanceheads)
Calloselasma (Malayan Pitviper)
Causus (Night Adders)
Cerastes (Horned Vipers)
Cerrophidion (Central American Montane Pitvipers)
Craspedocephalus (Ridge-nosed Tree Pitvipers)
Crotalus (Typical Rattlesnakes)
Daboia (Daboias)
Deinagkistrodon (Sharp-nosed Pitviper)
Echis (Carpet Vipers)
Eristicophis (Leaf-nosed Viper)
Garthius (Kinabalu Brown Pitviper)
Gloydius (Mamushis)
Himalayophis (Tibetan Bamboo Pitviper)
Hypnale (Hump-nosed Pitvipers)
Lachesis (Bushmasters)
Macrovipera (Giant Vipers)
Metlapilcoatlus (Northern Jumping Pitvipers)
Mixcoatlus (Mexican Montane Pitvipers)
Montatheris (Kenya Montane Viper)
Montivipera (Middle East Mountain Vipers)
Ophryacus (Mexican Horned Pitvipers)
Ovophis (Asian Mountain Pitvipers)
Parias (Malay Archipelago Pitvipers)
Popeia (South Asian Bamboo Pitvipers)
Porthidium (Hognosed Pitvipers)
Proatheris (Lowland Swamp Viper)
Protobothrops (Habus & allies)
Pseudocerastes (False Horned Vipers)
Sinovipera (Sichuan Mountain Pitviper)
Sistrurus (Pygmy Rattlesnakes)
Trimeresurus (Oriental Pitvipers)
Tropidolaemus (Temple Pitvipers)
Vipera (Typical Vipers or Adders)
Viridovipera (Green Tree Pitvipers)
Zhaoermia (Mangshan Pitviper)