Acting in response to https://www.inaturalist.org/flags/52193 given that "Subspecies: Makowsky et al. (2010) found little support for the recognized subspecies as either independent evolutionary lineages or geographically circumscribed units and conclude that although some genetic and niche differentiation has occurred, most populations assigned to N. erythrogaster appear to represent a single, widespread species. Thus we follow Boundy et al. in not recognizing any subspecies." http://reptile-database.reptarium.cz/species?genus=Nerodia&species=erythrogaster&search_param=%28%28search%3D%27Nerodia+erythrogaster%27%29%29