Water voles are Britain's fastest declining wild mammal, facing welfare harms from predation by American mink and habitat loss along watercourses.
Water voles face predation stress from an introduced predator against which they have no evolutionary defence. Mink locate and excavate burrows, killing entire family groups. Habitat loss through bankside clearance removes the cover essential for safety. Population fragmentation isolates groups, leading to inbreeding and reduced resilience. Successful conservation combines mink control, habitat restoration, and reintroduction, directly improving welfare outcomes for individuals in recovering populations.