Wild Water Shrew Aquatic Welfare

Water shrews are specialist aquatic predators dependent on unpolluted waterways - their welfare reflects river health.

Key Facts

Water shrews are the UK's largest shrew species and the only one adapted for aquatic foraging
They dive to catch invertebrates, small fish, and amphibians using venomous saliva to immobilise prey
Clean, unpolluted rivers with abundant invertebrate life are essential for water shrew welfare
They are very short-lived - rarely exceeding 12-18 months - making population productivity critical
Water shrew populations are difficult to survey but considered to be declining
Agricultural runoff, water abstraction, and pollution reduce prey availability and welfare

Welfare Considerations

Water shrew welfare as a specialist predator requires clean, productive waterways with high invertebrate diversity. Their welfare is directly linked to the health of the entire river invertebrate community. Improvements in water quality and riparian habitat management that benefit invertebrates directly benefit water shrew welfare.

What You Can Do

Support river restoration and water quality improvement projects in your area
Advocate for agricultural runoff reduction and better farm pollution management
Participate in Riverfly Partnership invertebrate surveys that underpin water quality assessment
Report water shrew sightings to local mammal groups for population monitoring
Donate to Wildlife Trust and Otter Trust river restoration programmes