Water voles are large voles in the genusArvicola. They are found in both aquatic and dry habitat through Europe and much of northern Asia. A water vole found in Western North America was historically considered a member of this genus, but has been shown to be more closely related to members of the genus Microtus.[1][2]
Head and body lengths are 12–22 cm, tail lengths are 6.5–12.5 cm, and their weights are 70–250 g. The animals may exhibit indeterminate growth. They are thick-furred and have hairy fringes on their feet that improve their swimming ability.
A 2021 phylogenetic study using mtDNA found that Arvicola may not belong with the rest of its namesake tribe Arvicolini, but rather forms a sister group to the tribe Lagurini.[3]
The American Society of Mammalogists recognizes four species, with A. italicus and A. persicus being split from A. amphibius, and A. scherman being synonymous with A. amphibius:[7]
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