The full blotched pattern sometimes fades and lighter crossbars with dark borders are all that remain. The ventral surface is yellow to orange and unmarked. In North America, Nerodia erythrogaster is found from Maryland to eastern New Mexico. In Texas, it is found throughout most of the state. Nerodia erythrogaster flavigaster in blue Nerodia erythrogaster transversa in green This project funded by the University of Texas College of Natural Sciences and the Texas Memorial Museum .
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