Water voles are Britain's fastest-declining mammal, and targeted riverbank restoration with mink control directly improves individual welfare and population recovery.
Water vole welfare is primarily threatened by American mink predation — a welfare crisis affecting millions of individual animals since mink colonisation. Mink predation causes the complete elimination of water vole colonies over weeks or months. Individual water voles caught by mink die as prey. Mink control in priority catchments directly prevents this welfare impact, allowing populations to recover. Reintroduction programmes introduce individuals that must establish territories — provision of suitable habitat is essential to reintroduction welfare.