Viperidae
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Subphylum: | Vertebrata |
| Class: | Reptilia |
| Order: | Squamata |
| Suborder: | Serpentes |
| Family: | Viperidae |
- Genus
- Adenorhinus
- (1 species) -- Mountain Bush Viper
- Agkistrodon
- (12 species) -- Copperhead and Cottonmouth
- Atheris
- (9 species) -- Bush Viper
- Atropoides
- (3 species) -- Jumping Pit Viper
- Azemiops
- (1 species) -- Fea's Viper
- Bitis
- (14 species) -- Puff Adder
- Bothriechis
- (7 species) -- Palm Pit Viper
- Bothriopsis
- (7 species) -- Forest Pit Viper
- Bothrops
- (30 species) -- Lancehead
- Calloselasma
- (1 species) -- Malayan Pit Viper
- Causus
- (6 species) -- Night Adder
- Cerastes
- (2 species) -- Horned Viper
- Cerrophidion
- (3 species) -- Montane Pit Viper
- Crotalus
- (29 species) -- Rattlesnake
- Daboia
- (5 species) -- Mid-East Viper
- Deinagkistrodon
- (1 species) -- Hundred-pace Viper
- Echis
- (10 species) -- Saw-scaled Viper
- Eristicophis
- (1 species) -- McMahon's Viper
- Hypnale
- (3 species) -- Humpnose Viper
- Lachesis
- (1 species) -- Bushmaster
- Ophryacus
- (1 species) -- Mexican Horned Pit Viper
- Ovophis
- (5 species) -- Asian Pit Viper
- Porthidium
- (8 species) -- Hognose Viper
- Pseudocerastes
- (3 species) -- False Horned Viper
- Sistrurus
- (3 species) -- Pigmy Rattlesnake
- Trimeresurus
- (37 species) -- Asian Pit Viper
- Tropidolaemus
- (1 species) -- Wagler's Palm Viper
- Vipera
- (20 species) -- Sand Viper