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
Green water snake giving the appearance of a ring of small plates around the eye, a character shared only with the species "N. floridana". A heavy-bodied snake, "N. cyclopion" is dark green, olive, or brown dorsally. Ventrally, it is yellowish on the anterior third, and the on remainder dark brown with yellow or white semicircles. "N. cyclopion" averages 76–140 cm (30-55 inches) in total length (including tail). "N. cyclopion" prefers still waters such as bayous, lakes, marshes, ponds, sluggish streams, and swamps. It is sometimes found in brackish water. The green water snake preys upon crayfish, frogs, and fish. The former subspecies, "Nerodia