Wildlife Corridor Design and Animal Welfare

How wildlife corridors reduce road mortality, habitat fragmentation, and associated animal suffering.

Key Facts

Road vehicle collisions kill an estimated 1 million vertebrate animals per day in the United States alone
Habitat fragmentation from roads and development prevents natural movement, feeding, and breeding behaviors
Wildlife overpasses and underpasses reduce animal-vehicle collisions by 70-95% where implemented effectively
Corridors must be appropriately sized, vegetated, and positioned where animals naturally seek to cross
Climate change increases the need for corridors as animals shift ranges in response to changing conditions

Welfare Considerations

The welfare impact of habitat fragmentation and road infrastructure on wildlife is vast and largely invisible. Animals attempting to cross roads between habitat patches face death or injury from vehicles; those unable to cross face reduced access to food, mates, and territory that diminishes their welfare and population viability. Wildlife corridors — whether vegetated underpasses, purpose-built overpasses, or restored habitat linkages — directly reduce both mortality and the chronic stress of movement restriction. The design and placement of corridors requires careful wildlife movement research to be effective; poorly placed or inadequately vegetated structures are used little. Corridor investment represents one of the highest-welfare infrastructure expenditures available to governments and landowners.

What You Can Do

Advocate for wildlife-sensitive road design including underpasses and overpasses in new infrastructure projects
Support land conservation organizations that prioritize wildlife corridor acquisition and restoration
Drive carefully at dawn and dusk in areas with wildlife crossing warning signs
Report wildlife road mortality to local databases that inform corridor planning decisions
Donate to organizations funding wildlife corridor research and implementation in fragmented landscapes