Costa Rica’s Wildlife Bridges Reduce Roadkill, Need Systemic Approach

Researchers in Costa Rica confirmed that wildlife crossings, underpasses and canopy bridges, are used by animals, but are most effective when integrated into a comprehensive mitigation system. A six-month study by Panthera Costa Rica, with support from the Inter-American Development Bank, compared animal use of crossing structures to nearby forest areas along two national highways.

The study recorded 36 species utilizing the crossings, but also documented 74 animals killed by vehicles on the same roads. The research led to the creation of Costa Rica’s first national protocols for planning, monitoring, and maintaining these structures, involving over 430 people in workshops and field activities.

While the crossings facilitate animal movement, their impact on reducing roadkill depends on factors like fencing, regular maintenance, and continuous monitoring. Researchers emphasize that a holistic approach is critical, as roads continue to fragment habitats and pose a threat to biodiversity. The Costa Rican model could serve as a blueprint for other Latin American countries seeking to design safer roads for both wildlife and people.