Effects of Acoustic Deterrents on Foraging Bats


Title: Effects of Acoustic Deterrents on Foraging Bats
Publication Date:
January 01, 2012
Document Number: NRS-129
Pages: 5
Sponsoring Organization:

Document Access

Website: External Link
Attachment: Access File
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Johnson, J.; Ford, W.; Rodrigue, J.; Edwards, J. (2012). Effects of Acoustic Deterrents on Foraging Bats. pp 5.

Significant bat mortality events associated with wind energy expansion, particularly in the Appalachians, have highlighted the need for development of possible mitigation practices to reduce or prevent strike mortality. Other than increasing turbine cut-in speed, acoustic deterrents probably hold the greatest promise for reducing bat mortality. However, acoustic deterrent effectiveness and practicality has not been experimentally examined and is limited to site-specific case studies. Accordingly, we used a crossover experimental design with prior control period to show that bat activity was reduced 17.1 percent by the deployment of ultrasonic deterrents placed around gauged watershed weir ponds on the Fernow Experimental Forest in West Virginia. We caution that while our results should not be extrapolated to the scope of a typical wind energy production facility, the results warrant further research on the use of acoustic deterrents to reduce bat fatalities.

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