Coluber constrictor is a species of non-venomous, colubrid snakes commonly referred to as the eastern racers. They are primarily found throughout the United States, east of the Rocky Mountains, but they range north into Canada, and south into Mexico, Guatemala and Belize. There are currently 11 recognized subspecies. Racers typically grow to around 3 1/2 feet long, but some subspecies are capable of attaining lengths of 6 feet. Their patterns vary widely between subspecies. Most are solid colored as their common names imply, black, brown, blue or green.

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