Wildlife Corridors: Reducing Road Mortality and Habitat Fragmentation

Wildlife corridors connect fragmented habitats, allowing animals to move safely between populations. Designing and protecting these corridors reduces the road mortality, inbreeding, and welfare harms of isolation.

Key Facts

Roads kill an estimated one million vertebrate animals per day in the United States alone
Road mortality causes both acute suffering from vehicle strikes and chronic population decline through fragmentation
Wildlife overpasses and underpasses have been demonstrated to dramatically reduce wildlife-vehicle collisions where implemented
The Banff wildlife overpasses in Canada are considered the most successful large carnivore crossing infrastructure globally
Florida panthers face severe genetic bottleneck from highway fragmentation, with inbreeding affecting reproductive fitness
Wildlife crossing infrastructure reduces vehicle accidents, generating economic benefits alongside welfare and conservation gains
Corridor connectivity allows species to adapt to climate change by facilitating range shifts as conditions change
Landscaping and land use planning decisions that preserve natural connectivity are as important as purpose-built crossings

Welfare Considerations

Wildlife corridors address welfare at multiple scales. Individual animals that are struck by vehicles experience acute suffering and death. Populations isolated in fragmented habitats face the chronic welfare consequences of reduced genetic diversity, limited mate choice, and inability to access all needed resources. Designing landscapes with wildlife movement in mind — through crossing infrastructure, speed reductions in migration corridors, and land use planning that preserves connectivity — prevents enormous amounts of preventable suffering while also protecting ecological function. This is one of the clearest cases where conservation and welfare objectives are completely aligned.

What You Can Do

Reduce vehicle speed and increase alertness in known wildlife crossing zones, particularly at dawn and dusk
Support local and regional planning processes that protect natural land corridors from development fragmentation
Advocate for wildlife crossing infrastructure investment in road development and upgrade projects
Support organizations like the Wildlife Conservation Society working on corridor mapping and protection
Donate to wildlife crossing feasibility studies and implementation projects in your region
Follow and amplify research demonstrating the welfare and safety benefits of wildlife crossing infrastructure