Wildlife

Wild Bat Wind Turbine Mortality and Mitigation

Wind turbines kill significant numbers of bats, particularly migratory species, but mitigation is available.

Key Facts

Wind turbines kill hundreds of thousands of bats annually in Europe and North America
Migratory species including noctule and soprano pipistrelle are most affected
Acoustic deterrents reduce bat mortality by 50-90% at some sites
Curtailment during high-risk periods is effective but reduces energy production

Welfare Considerations

Bats killed at wind turbines die from barotrauma — internal bleeding caused by rapid pressure changes near turbine blades — or direct strike. These deaths are instantaneous but represent avoidable mortality that is affecting populations already under pressure from habitat loss and disease. Acoustic deterrents and curtailment during high-risk migration periods can reduce mortality substantially at modest cost.

What You Can Do

Support development of acoustic deterrent requirements for wind farms
Advocate for bat mortality monitoring to be required at all wind farm sites
Engage with wind energy planning processes in areas with significant bat activity
Donate to bat monitoring and wind energy mitigation research