Bats and Wind Turbines: Welfare and Conservation Solutions

Wind turbines kill significant numbers of bats globally. Targeted mitigation measures can dramatically reduce mortality while allowing renewable energy generation.

Key Facts

Bats are killed by wind turbines through direct blade strike and barotrauma from pressure changes near blades
An estimated 600,000 to 1.3 million bats are killed by wind turbines in North America annually
Noctule bats, which fly at height, are particularly vulnerable to wind turbine mortality
Curtailment — stopping turbines when bat activity is high — reduces bat kills by up to 90%
Acoustic deterrents mounted on turbines reduce bat activity near blades without full curtailment

Welfare Considerations

Bats killed by wind turbines suffer the acute welfare harm of collision or barotrauma. Barotrauma — internal haemorrhage caused by pressure changes — may not kill instantly, leaving injured bats to die slowly near turbine bases. Noctule bats killed during autumn migration represent individuals with high fitness that have survived summer foraging — mortality concentrated in this period has significant population consequences. Unlike some wildlife hazards, turbine bat mortality is highly preventable through smart curtailment algorithms that are already available and cost-effective.

What You Can Do

Support wind energy projects that commit to bat monitoring and curtailment protocols
Advocate for mandatory bat impact assessment and mitigation in wind turbine planning applications
Donate to the Bat Conservation Trust's wind turbine research and advocacy
Engage with renewable energy companies about their bat mortality monitoring and mitigation
Support bat-friendly wind turbine siting that avoids key commuting routes and hibernation sites