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 Green water snake The green water snake ("Nerodia cyclopion") is a common species of nonvenomous natricine snake endemic to the southeastern United States. "N. cyclopion" is distributed from the Florida panhandle westward to Louisiana, and northward through the Mississippi Valley into southern Illinois. More precisely, it is found in southwestern Alabama, southeastern Arkansas, northwestern Florida, southern Illinois, southwestern Indiana, western Kentucky, Louisiana, southern Mississippi, southeastern Missouri, western Tennessee, and southeastern Texas. The type locality is New Orleans, Louisiana. "N. cyclopion" differs from most other species of North American water snakes by having one or more small scales under the eye,