Pituophis catenifer is a species of nonvenomous colubrid snake endemic to North America. Hognose snake is a common name for several colubrid snake species with upturned snouts. The nonvenomous, colubrid snake is indigenous to eastern and central North America. Opheodrys aestivus, commonly known as the rough green snake, is a nonvenomous North American colubrid. The bullsnake ("Pituophis catenifer sayi") is a large, nonvenomous, colubrid snake. Trimorphodon is a genus of mildly venomous, rear-fanged, colubrid snakes. Heterodon is a genus of harmless colubrid snakes endemic to North America. Gonyosoma is a genus of colubrid snakes. Ptyas is a genus of colubrid snakes. Mastigodryas is a genus of colubrid snakes. Dasypeltis is a genus of colubrid snakes. Sibynophiinae is a small subfamily of colubrid snakes commonly called hinged-teeth snakes. Some colubrid snakes are known predators of slugs. Leptodeira is a genus of colubrid snakes commonly referred to as cat-eyed snakes. The aquatic garter snake ("Thamnophis atratus") is a species of colubrid snake.