The grass snake, sometimes called the ringed snake or water snake, is a Eurasian non-venomous colubrid snake. It is often found near water and feeds almost exclusively on amphibians. The barred grass snake, Natrix helvetica, was split off as a separate species in 2017.
The smooth snake is a species of non-venomous snake in the family Colubridae. The species is found in northern and central Europe, but also as far east as northern Iran. The Reptile Database recognizes two subspecies as being valid, including the nominotypical subspecies described here.
The dice snake is a Eurasian nonvenomous snake belonging to the family Colubridae, subfamily Natricinae. It is also called water snake.
Coronella girondica is a species of harmless snake in the family Colubridae. The species is endemic to southern Europe and northern Africa. No subspecies are recognized as being valid.
The barred grass snake is a non-venomous colubrid snake from Western Europe, living in and close to water. It was included within the grass snake species, Natrix natrix, until August 2017, when genetic analysis led to its reclassification as a separate species.