Birds: The frequency is very low. Credible estimates indicate that currently installed capacity affects less than 0.01% of most species populations.
Where mortality does occur, albeit very infrequently, most take place during migration, so typically resident species and local populations are unaffected. Many important species have been documented to have low vulnerability to collision (e.g waterfowl like ducks and geese, water birds like cranes, herons and egrets, American golden plover) and utilize areas in wind farms for nesting, foraging and migratory stopover.
Collaboration between government, conservation agencies, and renewable energy developers has helped create rigorous guidelines for protecting bird populations. For example:
- Identifying and avoiding major migratory routes, areas of high conservation value, and critical habitat in siting
- Curtailment for eagle populations
- Providing compensatory mitigation where impact cannot be avoided
Bats: During planning and siting, Steelhead takes steps to identify local bat species and high-risk locations. We work with local and state agencies to create mitigation strategies and comply with federal laws like the Endangered Species Act. Additionally, the Vestas Bat Protection System available with our turbines enables controlled operation during periods of higher bat activity. NRG detection and deterrent systems also minimize impacts.