Behavioral, hunting and feeding habits. Generally, vipers are nocturnal. They often appear sluggish compared to other snakes, according to Nicolae Sfetcu, author of "Reptiles: Crocodiles, Alligators, Lizards, Snakes, Turtles" (Lulu Press, 2011). read more
Many species eat only certain types of prey. Some hognose snakes, for example, eat almost exclusively toads of the genus Bufo. Water snakes prey mostly on fishes and frogs, and the tree-climbing rat snakes eat mainly birds and bird eggs. Rattlesnakes eat mainly small mammals such as rodents. read more
Vipers are a large family of snakes; the scientific name is Viperidae. They are found all over the world, with the exceptions of Antarctica, Australia, New Zealand, Madagascar, north of the Arctic Circle and island clusters such as Hawaii. read more