Arvicola amphibius, commonly known as water vole, is a small, semi-aquatic rodent found in Europe and northern Asia. Some synonyms used to refer to this species include the European water vole, common water rat, and northern water rat. In Russia, it is referred to as vundurchik, while in Germany it is known as wasserratte. The water vole is an ecologically important species, playing a crucial role in maintaining wetland habitats. However, they are vulnerable to habitat loss, predators and pollution. Conservation efforts are ongoing to protect this species and ensure their survival in the wild.