Due to its limited range, it is considered a threatened species in the state of Texas.
The Concho water snake grows from 16 to 32 inches (41-81 cm), and looks very much like Nerodia harteri, but tends to be more red in color and has no dark markings on the underside.
- ↑ Densmore III, L.D., F.L. Rose and S.J. Kain. 1992. Mitochondrial DNA evolution and speciation in water snakes (genus Nerodia) with special reference to Nerodia harteri. Herpetologica 48(1):60-68.