Vipera (/ˈvɪpərə/; commonly known as the palaearctic vipers[2] and Eurasian vipers[3]) is a genus of snakes in the subfamilyViperinae of the familyViperidae. The genus has a very wide range, being found from North Africa to just within the Arctic Circle, and from Great Britain to Pacific Asia.[3] The Latin name vīpera is possibly derived from the Latin words vivus and pario, meaning "alive" and "bear" or "bring forth"; likely a reference to the fact that most vipers bear live young.[4] 21 species are recognized as being valid.[5] Like all other vipers, the members of this genus are venomous.
^Spawls S, Branch B (1995). The Dangerous Snakes of Africa: Natural History, Species Directory, Venoms and Snakebite. Sanibel Island, Florida: Ralph Curtis Books / Dubai: Oriental Press. 192 pp. ISBN0-88359-029-8.
^ abMallow D, Ludwig D, Nilson G (2003). True Vipers: Natural History and Toxinology of Old World Vipers. Malabar, Florida: Krieger Publishing Company. 359 pp. ISBN0-89464-877-2
^Gotch, A[rthur]. F[rederick]. (1986). Reptiles ~ Their Latin Names Explained. Poole, UK: Blandford Press. 176 pp. ISBN0-7137-1704-1.