water vole
US /ˈwɑː.t̬ɚ ˌvoʊl/
UK /ˈwɑː.t̬ɚ ˌvoʊl/

1.
a rodent of the hamster family, typically found in Europe and Asia, that lives in burrows near water and has a short tail and small ears.
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The water vole is an endangered species in some parts of the UK.
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We spotted a water vole swimming across the stream.