Snakes are long, limbless, flexible reptiles. There are approximately 2,900 species of snakes in the world, 375 of which are known to be venomous.
Snakes eat a varied diet, one that includes termites, rodents, birds, frogs, small deer and other reptiles. Snakes tend to eat their prey whole, and they are even able to consume food that is much larger than their head by separating their jaws. To keep prey from escaping, snakes have rear-facing teeth that hold their prey in their mouths. Snakes that are venomous will inject their prey with venom. Snakes that are not will simply squeeze and constrict their prey.
Snakes do not hunt every day. In fact, anacondas and pythons can survive for up to a year without food..
Scientists recently discovered the fossil of a snake more than 49 feet long.
Snakes can be found in every area of the world, save for Antarctica, Iceland, Ireland, Greenland and New Zealand.
Snakes often flick their tongues, which allows them to smell the air, and they are ectotherms, which means they must sun themselves in order to manage internal body temperature. Also, snakes must shed their skin three to six times per year.
Most species of snakes lay eggs, but some species give birth to live young. Snakes lay their eggs in a warm location. With the exception of some python species, eggs and young are not cared for by either parent.