Water voles have suffered the most dramatic decline of any UK mammal in the 20th century, driven by habitat degradation and predation by introduced American mink.
Individual water voles experience intense predation pressure from mink, which can enter burrow systems and cause complete colony elimination. The fear response to mink presence causes chronic stress in remaining voles and disrupts breeding behaviour. Habitat degradation through grazing, channel clearance, and pollution reduces food availability and shelter, imposing nutritional and thermal welfare burdens. Water voles captured for translocation as part of conservation programmes experience acute handling stress, requiring careful management to minimise welfare impacts. Successful recovery efforts integrate individual welfare considerations with population management goals.