What the study found
Bat activity at wind turbines in southern Vietnam was greatest in May–October, although moderate-to-high and high activity occurred in every month. The study also recorded 11 bat species at the turbines, while fieldwork confirmed 22 species locally.
Why the authors say this matters
The authors say the study helps fill a lack of information on bat activity and factors influencing it at wind farms in Southeast Asia. They suggest that the findings indicate low-wind-speed curtailment, meaning slowing or stopping turbine operation at low wind speeds, will be effective at reducing bat fatalities in the region.
What the researchers tested
The researchers used acoustic detectors to establish a one-year baseline for bat activity at wind turbines in southern Vietnam. They also compared bat activity with weather conditions, including rain, temperature, and wind speed.
What worked and what didn't
Increased wind speed significantly reduced bat activity. The findings suggest rain and temperature may have limited value for refining curtailment at the study site because they did not markedly reduce bat activity. However, the authors note this may not apply to areas in Southeast Asia with heavier rainfall or distinct winter periods.
What to keep in mind
This was the first publicly available study to report bat activity and factors influencing it at a wind farm in Southeast Asia, so the authors say much remains to be learned. The abstract does not describe additional limitations beyond this scope note.
Key points
- Bat activity at the turbines was highest in May–October.
- Moderate-to-high and high bat activity occurred in every month.
- Acoustic detectors recorded 11 bat species at the turbines and 22 species locally.
- Higher wind speeds significantly reduced bat activity.
- Rain and temperature did not markedly reduce bat activity at the study site.
Disclosure
- Research title:
- Bat activity at Vietnamese wind turbines was highest in warmer months
- Authors:
- Neil M. Furey, Vương Tân Tú, Alan T. Hitch, John Pilgrim, Mark Kunzer
- Institutions:
- Sevenoaks Hospital, Vietnam Academy of Science and Technology, California Department of Fish and Wildlife, United States Fish and Wildlife Service, Harrisburg University of Science and Technology, Suffolk Horse Society, Asian Development Bank Institute
- Publication date:
- 2026-02-27
- OpenAlex record:
- View
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