Water voles are the UK's fastest-declining wild mammal and face extinction in many river systems, with individual welfare threatened by mink predation and habitat loss.
Water voles subject to mink predation face a severe welfare situation: mink can enter bank burrows and kill entire colonies including dependent young. Individual water voles die in predation events that are traumatic and often prolonged. The collapse of colonies through predation leaves no surviving individuals to experience recovery - the welfare impact is absolute. Mink control that removes the predation pressure prevents this catastrophic population-level welfare harm.