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Annual Report_09-10 - Bat Conservation International

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nor th american Conser vation Programs<br />

<strong>Bat</strong>s and Wind energy<br />

©MICHAEL SCHIRMACHER, BCI / 0047907<br />

BCi Biologist Michael schirmacher installs an acoustic monitor at the top of a wind turbine<br />

in Pennsylvania as part of a <strong>Bat</strong>s and Wind energy Program study.<br />

Key Partners<br />

American Wind & Wildlife Institute<br />

AWEA Member Companies<br />

Deaton Engineering<br />

Duke Energy<br />

Edison Mission<br />

First Wind<br />

Iberdrola Renewables<br />

Instituto de Ecología, UNAM<br />

National Renewable Energy Laboratory<br />

Pennsylvania Game Commission<br />

Theodore Roosevelt <strong>Conservation</strong><br />

Partnership<br />

U.S. Department of Energy<br />

U.S. Fish & Wildlife Service<br />

U.S. Geological Survey<br />

University of Bristol<br />

University of Calgary<br />

W<br />

ind power, a clean and renewable source of electricity, is an<br />

attractive alternative to fossil fuels, but harmful impacts on<br />

wildlife continue to plague this rapidly growing industry. Wind<br />

turbines are killing bats at alarming rates across the world, with<br />

bat deaths in the U.S. alone estimated as high as hundreds of<br />

thousands a year.<br />

Research led by BCI and partners has demonstrated that bat<br />

fatalities can be sharply reduced through “curtailment” – basically<br />

shutting down wind turbines’ spinning blades on low-wind nights<br />

when bats are migrating. That research is beginning to pay off, as<br />

BCI’s <strong>Bat</strong>s and Wind Energy Program is advising several windpower<br />

companies on plans to use curtailment as part of mitigation<br />

efforts where endangered Indiana myotis (Myotis sodalis) are at risk.<br />

<strong>Bat</strong> <strong>Conservation</strong> <strong>International</strong> has been working intensely to<br />

limit bat mortality at wind-energy sites since 2003, when we cofounded<br />

the <strong>Bat</strong>s and Wind Energy Cooperative (BWEC) in partnership<br />

with the American Wind Energy Association, the U.S.<br />

Department of Energy’s National Renewable Energy Laboratory<br />

and the U.S. Fish and Wildlife Service. BCI coordinates the work<br />

of the cooperative.<br />

Previous BWEC research demonstrated a significant reduction<br />

in bat fatalities by curtailing turbines when wind speeds are less<br />

than 5 meters per second (11.1 miles per hour), with a loss of less<br />

than 1 percent in total electricity production. <strong>Bat</strong>s and Wind Energy<br />

Coordinator Cris Hein is fine-tuning those results to better<br />

understand how bats interact with wind turbines.<br />

Studies begun in the spring will try to optimize the curtailment<br />

strategy by correlating patterns of bat activity with weather conditions<br />

and time of night.<br />

BCI also is working with the U.S. Geological Survey on a<br />

unique study that combines marine radar systems, near-infrared<br />

video cameras, acoustic detectors and ground surveys. The study<br />

will explore whether bats are attracted to wind-energy facilities<br />

(using radar) or to the turbines themselves (using video cameras).<br />

Comparing data gathered with these different technologies and<br />

methods should also help us determine whether (and how) bat<br />

activity is related to fatalities. Additional studies using this integrative<br />

system will continue into 2013.<br />

BCI and its partners are also continuing our work toward an<br />

effective acoustic deterrent. These devices, which emit highfrequency<br />

noise to jam bats’ echolocation abilities, are showing<br />

potential for reducing bat fatalities at wind turbines. We are<br />

providing expertise and support for preliminary tests of the nextgeneration<br />

device and preparing plans to study its impact on<br />

fatalities at an operational wind-energy facility.<br />

Last January, BCI hosted the third BWEC Science Meeting in<br />

Austin, Texas, as members and invited scientists reviewed the existing<br />

priorities and set the direction for future endeavors.<br />

The <strong>Bat</strong>s and Wind Energy Program’s next major goal is to cooperate<br />

with our international partners to exchange ideas on how<br />

best to resolve bats and wind energy issues abroad. Wind energy<br />

is spreading around much of the world, and BCI is working to give<br />

widespread communities and organizations the tools to limit bat<br />

deaths at wind facilities. We are also expanding the wind program<br />

to provide training opportunities for partners and other windenergy<br />

professionals. We are preparing a bats and wind energy<br />

workshop for conservation organizations, natural-resource managers,<br />

government agencies and wind-industry officials on the latest<br />

research results and technologies for assessing wind-energy<br />

impacts. We are in the process of preparing agendas, materials<br />

and presentations and considering locations for our first international<br />

workshop.<br />

Wind power is expanding rapidly throughout North America<br />

and the world. So is BCI’s <strong>Bat</strong>s and Wind Energy Program.<br />

6 B aT C o n s e rvaT i o n i n T e r n aT i o n a l

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