Viper

Venomous (not poisonous)

Vipers are venomous snakes with long, hinged fangs that permit deep penetration and injection of their venom. When not in use, the fangs fold back against the roof of the mouth and are enclosed in a membranous sheath. These snakes can decide how much venom to inject depending on the circumstances. The most important determinant of venom expenditure is generally the size of the snake; larger specimens can deliver much more venom. The species is also important, since some are likely to inject more venom than others, may have more venom available, strike more accurately, or deliver a number of bites in a short time. In predatory bites, factors that influence the amount of venom injected include the size of the prey, the species of prey, and whether the prey item is held or released. Almost all vipers have keeled scales, a stocky build with a short tail, and due to the location of the venom glands, a triangle-shaped head distinct from the neck. Typically, vipers are nocturnal and ambush their prey.

Genetic Descendants