Wildlife corridors are strips of habitat connecting fragmented areas, allowing animals to move safely between patches. They reduce road casualties, inbreeding, and the welfare cost of habitat isolation.
Fragmented habitats impose welfare costs on individual animals: road deaths, territorial conflict from habitat crowding, starvation from limited foraging range, and inbreeding depression reduce quality and length of life. Wildlife corridors address these welfare harms directly by restoring movement ability. Road crossing structures prevent the welfare tragedy of wildlife-vehicle collisions, which cause significant suffering to injured animals before death.