Wildlife corridors — strips of habitat connecting fragmented natural areas — improve animal welfare by enabling migration, reducing road mortality, allowing access to seasonal resources, and preventing inbreeding in isolated populations.
Road mortality represents welfare harm of immense scale — millions of animals experiencing traumatic deaths or injury annually from vehicle collisions. Wounded animals that survive collisions may live for hours or days in pain before death. Beyond direct mortality, isolation from habitat fragmentation causes chronic nutritional stress as animals cannot access seasonal food resources, and inbreeding depression leads to reduced immune function and reproductive failure. Wildlife crossing infrastructure directly reduces these welfare harms by enabling safe movement. The benefit extends to individual welfare through reduced stress from habitat isolation. Investing in wildlife crossing design and construction represents one of the highest-impact welfare interventions at the landscape scale.