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The North American racer snakes is commonly known as northern black racer. The scientific name of these snakes is coluber constrictor constrictor. Coluber is the Latin word and the meaning of the same is snake. Constrictor is again the Latin name which means together, or with. The other vernacular names of these snakes are plenty and are listed as follows. They are black runner, black racer, chicken snake, blue racer, hoop snake, green snake, black slick snake, horse racer, black true snake, white throat racer, and cow sucker. The average length of the snake racer reptile will be from 35 inch to 60 inch. These snakes are relatively larger snakes and are black in color. The belly will be grey in color and the chin of the snake will be white. The body of the snake will be round and the scales that are found on the body will be smooth. The males and the females look alike and are very difficult to differentiate them by the appearance. The young ones will be dark grey patter against the brown body. The color of the Venter will be cream and can have black dots that are irregular. Brown or black dots that are small can be seen on the lateral to the dorsum. Racer American snakes are often confused with rat snake. But the rat snake body will have bread loaf shape in cross section. The rat snakes have keeled scales which is absent in such snake that is found in most states in North America. The juvenile rat snakes will have pattern that resembles the checker board and eye jaw stripe on the belly portion. The juvenile rat snakes will have blotches that are irregular with posterior and anterior projections. Hog nosed snake black phase is also confused with the racer snake. But these hog nosed snakes are stocky and short when compared to black racer snakes. The distribution of such wildly popular American snake are found in the Virginia and west part of the Blue Ridge Mountain. Other than southwest part of America, these snakes can be found in all other northern parts of America and south Canada. Relating food, these North American racer snakes are carnivores. These snake feed on frogs, skinks, chipmunks, small birds, squirrels, butterfly, larva of moth, mice etc. the juveniles feed on invertebrates while the adults feed on reptiles and rodents. North American racer snakes hold the prey tightly in the body loops and swallow them alive.
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