The State of the Science on Land-Based Wind Energy and Birds

The 2025 U.S. State of the Birds report revealed that birds are struggling rapid population declines throughout the US from impacts like habitat loss. Audubon’s science reveals that two-thirds of North American bird species are prone to extinction except we take daring motion to chop air pollution and sluggish the rise in world temperatures. More and more excessive climate circumstances and shifting seasons are already altering ecosystems and threatening species’ survival.  

When completed responsibly, creating extra land-based wind vitality might help shield birds from these escalating threats. As demand for vitality continues to develop, it’s important that we plan thoughtfully for easy methods to meet these wants. Wind vitality is one in every of many ways in which human actions work together with hen populations and habitats, with other structures like buildings having greater impacts, and analysis efforts over the past a number of a long time have continued to enhance understanding to keep away from or decrease dangers. That is why Audubon advocates for planning and siting tasks primarily based on the very best out there science and dealing with native communities to make sure that improvement advantages each folks and wildlife. 

The most recent publication from the Renewable Power Wildlife Institute (REWI), Wind Energy Interactions with Wildlife: Answers to Frequently Asked Questions Based on the State of the Science, offers a complete abstract of publicly out there details about how land-based wind energy interacts with birds and bats in North America. It additionally highlights the newest methods to keep away from and decrease impacts like collisions and habitat degradation, underscoring that early and significant engagement with state wildlife administration businesses, cautious planning, analysis, and collaboration might help advance the clear vitality tasks we want.  

Accountable Land-Based mostly Wind Improvement 

Accountable wind improvement entails siting and working tasks in ways in which advance renewable vitality whereas decreasing dangers to birds and different wildlife. Finest practices and superior mapping are used to establish low-conflict areas and keep away from websites which are important for birds. Collision-reducing applied sciences, conservation offsets for any unavoidable impacts, and rigorous monitoring earlier than and after development additionally assist make sure that tasks proceed to reduce impacts to birds over time. 

Audubon is a founder and Board member of REWI, an impartial nonprofit convening renewable vitality firms, conservation and science organizations, and public businesses to develop and leverage peer-reviewed science on renewable vitality, wildlife, and ecosystems. With over 120 years of conservation science, Audubon works with builders and decision-makers on accountable land-based wind vitality improvement.

For instance, Audubon’s collaboration with wind tasks within the Tehachapi Mountains of California resulted in experimentation with superior applied sciences to detect Golden Eagles and California Condors in the event that they enter a mission space in an effort to flip the generators off in round 30 seconds. Most of the wind tasks additionally offered conservation advantages to California Condors prematurely by way of captive breeding packages and different measures by way of a U.S. Fish and Wildlife Service (USFWS) permit that provides conservation earlier than any Condors have been harmed. Since then, no Condors have been killed or injured at a wind mission and the inhabitants has grown by way of the allow.  

Key Takeaways from the REWI Abstract 

• In latest a long time, in depth analysis has examined how land-based wind vitality interacts with wildlife and their habitats. Audubon has been a part of these efforts for the reason that first assembly of the National Wind Coordinating Collaborative (NWCC), a precursor to REWI, in 1994. REWI’s abstract synthesizes publicly out there, peer-reviewed, scientific research performed by skilled biologists and analyzed utilizing rigorous, neutral strategies.  
• For a lot of birds, the present charge of estimated mortality from wind generators wouldn’t be anticipated to have a population-level influence. The species most often affected by turbine collisions are typically frequent perching birds like Mourning Doves with giant populations and excessive reproductive charges. For these species, the influence from wind generators is often lower than 0.02 % of their whole inhabitants, which is remarkably low in comparison with different, way more widespread causes of hen mortality similar to constructing collisions.  
• Nevertheless, some hen species are extra weak to inhabitants degree impacts than others. Species with declining populations which are delicate to any further sources of mortality or disturbance, similar to Better Sage-Grouse, Ferruginous Hawk, and Lesser Prairie Hen, are a excessive precedence for Audubon when partaking on a wind mission. A 2020 report from USFWS revealed that populations of Golden Eagles are stable, however cumulative impacts from varied stressors like lead poisoning, taking pictures, and electrocution on energy traces could contribute to additional declines. As a result of Golden Eagles have comparatively small populations and sluggish reproductive charges, any further mortality from turbine collisions can have a larger influence on their total inhabitants trajectory.  
• New applied sciences are at present deployed at wind tasks to reduce the dangers for these species that might have elevated ranges of influence from wind vitality. For instance, camera-based programs coupled with machine imaginative and prescient algorithms can detect and classify raptors like Golden Eagles in actual time and might considerably cut back fatalities by robotically shutting down generators. Analysis continues in further applied sciences and working practices that will keep away from and decrease hurt to birds like contrast painting of turbine blades.  

Responsibly sited and operated land-based wind vitality tasks are important to safeguarding the way forward for birds and other people. Researchers, conservationists, and trade companions are working collectively to develop and implement methods to keep away from, decrease, monitor, and offset impacts. With the very best out there science, continued collaboration, and neighborhood enter, we are able to construct a clear vitality future that advantages the local weather, folks, and conservation. 

For extra details about REWI’s new publication, go to Wind Energy Interactions with Wildlife: Answers to Frequently Asked Questions Based on the State of the Science.