Vipers

• Adders and Puff Adders
• Copperheads
• Cottonmouths@
• Massasaugas@
• Old World Vipers
• Rattlesnakes
• Rattlesnakes, Pygmy

• Science: Biology: Plants and Animals: Animalia: Chordata: Reptilia: Squamata: Serpentes: Xenophidia: Viperidae 

• Arabian Horned Viper (Cerastes gasperettii)  - ARKive.org features images, facts, status, range, habitat, diet, behavior, threats, and conservation.
• Common Lancehead (Bothrops atrox)  - Reports range, habitat, description, reproduction, behavior, food habits, and status. Includes pictures.
• Family Viperidae (Vipers and Pit Vipers)  - Includes appearance, distribution, habitat, food, behavior, reproduction, venom, and list of genera.
• Viperidae  - Contains taxa, genera, species account, distribution, pictures, morphology, and related sites.
• Vipers and Pitvipers: Viperidae  - Lists physical characteristics, habitat, diet, behavior, reproduction, and interaction with people.