Pituophis catenifer is a species of nonvenomous colubrid snake endemic to North America. The nonvenomous, colubrid snake is indigenous to eastern and central North America. The bullsnake ("Pituophis catenifer sayi") is a large, nonvenomous, colubrid snake. Belize is home to many different tropical snake species, including both venomous and nonvenomous snakes. Other nonvenomous snakes resemble the Texas coral snake as a form of Batesian mimicry. Antaresia is a genus of pythons, nonvenomous snakes found in Australia. Racers are nonvenomous and do not breed with cottonmouths. With the exception of large constrictors, nonvenomous snakes are not a threat to humans. Lamprophis is a genus of medium-sized, nonvenomous snakes commonly referred to as African house snakes. Like all kingsnakes, they are nonvenomous. Bothrochilus is a genus of nonvenomous pythonid snakes, which currently comprises seven species. However, gopher snakes are nonvenomous, generally good natured, and not harmful to humans. The eastern racer ("Coluber constrictor") is a species of nonvenomous snake in the family Colubridae. Broad-headed skinks are nonvenomous. Liasis is a genus of nonvenomous pythons found in Indonesia, New Guinea and Australia.