Description :

Average size: 51–142 cm (20–56 in), record 180 cm (72 in).The Southern black racer has a white chin, whereas an indigo snake normally has a dark to reddish orange chin.[2]

Diet :

The southern black racer is a predator that relies on lizards, insects, moles, birds, eggs, small snakes, rodents, and frogs. Despite its specific name constrictor (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.[2]

Man remains the biggest enemy of black racers. Many are killed on highways and others are intentionally killed out of fear. The white chin causes many 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 prey as hawks including the red-shouldered hawk and broad-winged hawk. These perching and soaring birds have keen eyesight and drop down from above to capture black racers and other snakes thus making their speed and ground awareness ineffectual.[3]