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
Burmese keelback water snake the population of the species is unclear due to the wide range of their habitat, and size and trends are currently unable to be determined. However, the snake is known to be rare, as only a single specimen was discovered in 2010 during a twelve year survey in Myanmar. The area surrounding the Irrawaddy River has undergone intensive deforestation and land conversion for cultivation and agriculture. The extent of the impact upon the species, if any, remains unknown despite the continuance of the changing nature of the landscape. Burmese keelback water snake The Burmese keelback water snake ("Xenochrophis bellulus") is