Southern black racer (scientific name: "Coluber constrictor"), the racer is more likely to suffocate or crush its victim into the ground, rather than coiling around it in typical constrictor fashion. Man remains the greatest enemy of black racers. Many are killed on highways and others are intentionally killed out of fear. The white chin causes some people to kill this snake, believing that it is a cottonmouth – a venomous snake more commonly called a water moccasin. The venomous snake has a white lining inside of its mouth. Racers are nonvenomous and do not breed with cottonmouths. Natural enemies include such birds of
Chinese water snake Chinese water snake The Chinese water snake, Chinese smooth water snake, Chinese mud snake or Chinese rice paddy snake ("Enhydris chinensis" or "Myrrophis chinensis") is a species of mildly venomous, rear-fanged snake, endemic to Asia. "M. chinensis" is found in China, Taiwan, and Vietnam. As the common name suggests, the Chinese water snake is a highly aquatic species, adapting well to human-altered environments such as fish pools and rice paddies. "M. chinensis" is considered common, although it has declined in Taiwan and is protected there. "Myrrophis chinensis" is a relatively small snake reaching total length (including tail) of up to