As wind energy development increases worldwide, hundreds of thousands of bat fatalities are estimated to occur due to collisions with terrestrial wind energy facilities in North America.

“Turbine attraction is a leading hypothesis for high observed fatality rates, particularly in migratory tree bats…[and] while fatality rates vary among sites, the estimated cumulative mortality is high enough to be considered a serious conservation concern for at least one North American bat species.”

BRI’s researchers found strong evidence that operational curtailment, a mitigation approach that involves raising the threshold for ambient wind speed at which turbines begin generating electricity, reduces bat fatality rates at terrestrial wind farms.

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https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0256382