Seabird Offshore Wind and Collision Risk

The rapid expansion of offshore wind energy raises welfare questions about bird and bat collisions with turbines, requiring careful site selection and monitoring to minimize harm.

Key Facts

UK offshore wind capacity is expanding rapidly to meet net zero targets
Seabirds including gannets, kittiwakes, and auks are vulnerable to turbine collision mortality
Collision mortality is difficult to quantify at sea as carcasses sink or are not recoverable
Radar and deterrent systems can reduce collision rates by triggering turbine shutdowns when birds approach
Displacement from feeding and breeding areas may have greater population impact than direct collision mortality

Welfare Considerations

Offshore wind collision welfare concerns involve both direct mortality from turbine strikes and indirect welfare harm from displacement. Direct collision causes acute traumatic death or injury. Displacement from important feeding areas forces seabirds to travel further for food, increasing energy expenditure and reducing breeding success. The cumulative impact of multiple offshore wind developments on shared seabird populations requires population-level welfare assessment rather than site-by-site evaluation. Deterrent technologies including acoustic and visual warning systems and radar-triggered shutdowns can reduce collision rates. Careful site selection avoiding key foraging and migration routes minimizes displacement impacts.

What You Can Do

Support renewable energy development that includes rigorous seabird impact assessment and mitigation
Advocate for cumulative impact assessment considering multiple offshore wind developments together
Donate to seabird monitoring programs providing evidence for wind energy siting decisions
Follow BTO and RSPB research on seabird-wind farm interactions and mitigation effectiveness
Support policy requiring pre- and post-construction seabird monitoring at all offshore wind sites