Acoustic warning system prompted avoidance responses from golden eagles at two US wind farms

Two U.S. states are testing feasible bird deterrent methods at wind farms as part of conservation efforts.

Commercial-scale renewable energy facilities are rapidly expanding across the American West to meet rising power demands.

But as these green energy projects scale up, the risk of collisions with local wild birds significantly increases.

To maintain regional grid stability without turning to fossil fuels, vast volumes of green generation capacity must be deployed.

To mitigate these hazards, different technologies are being tested to help vulnerable species change course.

Will targeted mitigation efforts help protect native wildlife?

How the American West must become greener

The rapid adoption of modern technologies and networks has surged power consumption to record highs. National electricity usage is set to exceed 4,260 billion kilowatt-hours in 2026.

Primary drivers include widespread electrification, AI data center expansion, and major domestic production growth.

As these factors continue to raise electricity needs, the nation is still pressured to meet mandatory carbon-reduction targets.

State and federal policies specify these ambitious targets.

However, strained power grids have made satisfying both more complicated.

Across the U.S., regions experience infrastructure delays and transmission bottlenecks.

This threatens electricity generation reliability as demand surges.

To maintain regional grid stability without turning to fossil fuels, vast volumes of green generation capacity must be deployed.

Consequently, the American West has become the ideal frontier for meeting both challenges.

The area holds unmatched green resources, especially wind.

It has already driven large-scale renewables past 17% of total U.S. generation.

Reaching higher into the sky for greater wind generation

The American West’s vast expanses of open, low-density land are ideal for utility-scale wind projects.

Furthermore, it offers strong, reliable wind corridors blowing through mountain passes and across high plains.

Currently, the U.S. total wind capacity is nearly 166 gigawatts, with the Western region driving a major share.

Texas is the nation’s leading wind-producing state, with nearly 20,000 active wind turbines.

Other Western states like California and Washington together operate thousands more.

But future installations must significantly scale up in size to meet the unprecedented rise in electricity demand.

Next-generation turbines are now being deployed with taller towers and wider rotor diameters that often exceed 500 feet.

These units are vital, as they reach higher, more consistent wind currents.

This enables greater megawatt-hour generation with fewer physical structures.

Unfortunately, as turbines become taller, the threats to wild birds become more evident.

Researchers are now testing mitigation methods to help bird conservation.

Creating invisible barriers in the sky

Wind farms pose major collision risks to native birds like eagles, increasing the probability of biodiversity loss.

Researchers from H.T. Harvey & Associates and the Renewable Energy Wildlife Institute (REWI) conducted a study focusing on bird deterrents.

The research evaluated the effectiveness of automated DTBird detection and audio deterrent units.

They were tested across commercial operating wind farms in the Western U.S.

California’s Manzana Wind Power Project and Washington’s Goodnoe Hills Wind Farm served as test sites.

Evaluating behavioral reactions from large soaring raptors

Golden Eagles, Bald Eagles, Turkey Vultures, and buteos were key target species of the study.

Audio warnings triggered evasive behaviors from 79% of probable Golden Eagles in California and 61% in Washington.

Active audio alarms doubled deterrence effectiveness compared to just operational turbines.

When alarms were sounded, only 27% of raptors showed no response.

Birds already on moderate to high collision courses reacted more strongly to audio cues than those at low risk.

Golden Eagles and Turkey Vultures had increased deterrence probability at higher wind speeds. Smaller buteos showed a slight negative relationship.

The study’s findings highlight that clean power generation and wildlife conservation can coexist.

As wind farms scale up in the American West, proven mitigation tools will offer practical paths forward.

Ultimately, acoustic warning systems will help fast-track renewable capacity growth while boosting wild bird preservation.

The research findings can be reviewed with: Smith, J. P., Felton, S. K., Schneider, S. R., Romansic, J. M., Zirpoli, J. A., Terrill, S. B., & Allison, T. D. (2026). Behavioral Responses of Large Soaring Raptors to Audio Deterrents at Commercial Wind-Energy Facilities in the Western USA. Journal of Raptor Research, 1(aop).