What is the formal binomial nomenclature for the European Water Vole?

*Arvicola amphibius*

Binomial nomenclature, established by Linnaeus, provides a standardized two-part name (Genus species) essential for global scientific communication, preventing confusion caused by overlapping common names across continents. For the European Water Vole, which is the larger, truly aquatic species widely distributed across Great Britain and much of continental Europe, the accepted binomial name is *Arvicola amphibius*. While older texts sometimes reference *Arvicola terrestris*, especially concerning more terrestrial forms within the broader European water vole complex, *A. amphibius* is the designated name for the species strongly associated with water habitats. This specificity ensures that ecological discussions concerning diet, behavior, or conservation efforts relate accurately to that specific genetic lineage.