Wildlife corridors enable animal movement between fragmented habitats, reducing road mortality, inbreeding, and the welfare costs of habitat isolation.
Wildlife corridor investment prevents welfare harm at scale by enabling animals to move between habitats without crossing roads. Each animal killed on a road suffers a traumatic death that a functioning corridor could prevent. Beyond mortality, habitat isolation creates welfare costs through food scarcity, inability to find mates, and inbreeding-related health problems. Corridor planning that addresses the specific movement requirements of target species - including water channels for otters, rough vegetation for hedgehogs, and woody structure for dormice - maximises welfare benefit per investment.