The head, which is slightly flattened and more elliptical in shape than triangular, is not covered with numerous small scales like most other vipers, but with large shields like the colubrids and the elapids.
The New Guinea bockadam or dog-faced water snake, Cerberus rynchops, is a species of a colubrid snake found in coastal waters of Asia and Australia.
Coluber constrictor anthicus, commonly known as the buttermilk racer, is a subspecies of racer, a nonvenomous, colubrid snake, endemic to the southern United States.
Bluebirds of all ages (including adults) are threatened by rat snakes, racers and American kestrels.
Hypsiglena torquata jani, commonly known as the Texas night snake, is a subspecies of small colubrid native to the southwestern United States and northeastern Mexico.
The keeled slug-eating snake, Pareas carinatus, is a species of snake in the Colubridae family.
In at least one case in Zittau 1712, a snake from the non-venomous class Colubridae was used.
The western ground snake (Sonora semiannulata) is a species of small, harmless colubrid snake endemic to North America.