Water Vole

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Mammal 🐭
🐭
Water Vole
Arvicola amphibius
Size
14–22 cmAbout the size of a large computer mouse
Weight
150–350 gAbout the weight of a small tin of tuna
Lifespan
2–3 years
Rarity
Rare
M vs F
Males are slightly larger; otherwise sexes look identical
Habitat
Riverbanks with dense vegetation, reedbeds, ditches, streams
Best time
April–October (most active)
Conservation
UK: Red LC
💡 Did you know?
The Water Vole — Ratty from 'The Wind in the Willows' — has declined by 95% in the UK since the 1970s, making it one of our most threatened mammals
Introduced American Mink are the single biggest driver of Water Vole decline — a single mink can decimate an entire riverside population within months
Often confused with
Brown Rat (longer scaly tail larger ears pointed snout) Field Vole (shorter inland no swimming)
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