Classification
Biota [regio]Animalia [regnum]
Chordata [phylum]
Reptilia [classis]
Squamata [ordo]
Serpentes [subordo]
Natricidae [familia]
Natrix [genus]
Genus Natrix contains the following taxa:
Natrix helvetica (Lacépède, 1789) [species]
Natrix natrix (Linnaeus, 1758) [species]