Wild Mammals

Bats and Wind Turbine Collision Risk

Wind turbines kill significant numbers of bats through direct collision and barotrauma, requiring careful siting and operational mitigation.

Key Facts

Bat fatalities at turbines are primarily caused by barotrauma from pressure changes
Migratory bat species are most at risk during autumn movements
Curtailing turbine operation at low wind speeds reduces bat kills by 50-90%
UK guidance requires bat surveys before planning approval
Long-eared bats are less affected than noctules and pipistrelles

Welfare Considerations

Barotrauma from turbine blade pressure changes causes internal haemorrhage and is likely painful. Bats hit directly by blades suffer traumatic injuries. Mortality of reproductive females has disproportionate population impacts since bats typically rear only one pup annually. Cumulative mortality across many turbines can affect local populations.

What You Can Do

Support planning requirements for pre-construction bat surveys
Advocate for curtailment protocols during high-risk periods
Back deterrent technology research to reduce turbine impacts
Support bat monitoring programs at existing turbine sites
Engage in renewable energy planning processes to raise bat concerns