types:
constrictor
any of various large nonvenomous snakes that kill their prey by crushing it in its coils
elapid,
elapid snake
any of numerous venomous fanged snakes of warmer parts of both hemispheres
sea snake
any of numerous venomous aquatic viviparous snakes having a fin-like tail; of warm littoral seas; feed on fish which they immobilize with quick-acting venom
viper
venomous Old World snakes characterized by hollow venom-conducting fangs in the upper jaw
hoop snake
any of various harmless North American snakes that were formerly believed to take tail in mouth and roll along like a hoop
leaf-nosed snake
any of various pale blotched snakes with a blunt snout of southwestern North America
racer
slender fast-moving North American snakes
rat snake
any of various nonvenomous rodent-eating snakes of North America and Asia
king snake,
kingsnake
any of numerous nonvenomous North American constrictors; feed on other snakes and small mammals
water snake
any of various mostly harmless snakes that live in or near water
black-headed snake
small secretive ground-living snake; found from central United States to Argentina
vine snake
slender arboreal snake found from southern Arizona to Bolivia
lyre snake
mildly venomous snake with a lyre-shaped mark on the head; found in rocky areas from southwestern United States to Central America
boa
any of several chiefly tropical constrictors with vestigial hind limbs
cobra
a venomous Asiatic and African elapid snake that can expand the skin of the neck into a hood
mamba
arboreal snake of central and southern Africa whose bite is often fatal
krait
brightly colored venomous but nonaggressive snake of southeastern Asia and Malay peninsula
pit viper
New World vipers with hollow fangs and a heat-sensitive pit on each side of the head