Wildlife corridors allow animals to move between fragmented habitats, reducing suffering from isolation, road mortality, and resource stress.
Animals in fragmented habitats suffer from inbreeding depression, inability to find mates, starvation in isolated patches, and death attempting to cross roads. Isolated populations develop genetic disorders and disease vulnerability. Corridors reduce all these welfare harms at scale. Each highway underpass built represents thousands of prevented animal deaths and enormous welfare improvement across generations.