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Bat fatalities at wind energy turbines offer new insight into bat migration 

Credit:  Smoky Mountain News, www.smokymountainnews.com 17 November 2010 ~~

New data suggest that bats, like birds, may follow specifically defined routes when migrating rather than simply migrating in a dispersed way across a broad area. Wind energy turbines located in these routes may cause fatalities of migrating bats.

As new sources of energy such as wind farms are being built in greater numbers, their impact on other aspects of the environment are getting attention.

The migratory behavior of bats, a topic that has received little attention in the past, is the subject of new study. Wind turbines have been the cause of many bat fatalities, but these installations also offer a new opportunity to examine bat migration habits. This is because the majority of bat fatalities caused by wind turbines around the world have involved migratory bats during fall migration.

Over a period of seven years, scientists used acoustic monitoring and carcass searches at nine wind energy facilities across southern Alberta, Canada, to determine if bat activity and fatality were concentrated in certain areas or evenly distributed across the landscape. Their findings indicate that as bats migrated, they concentrated along selected routes at night and sought daytime roosting sites. Migratory tree-roosting bats, including hoary bats, eastern red bats, and silver-haired bats, are the North American species most affected by wind farms.

The full text of this article, “Geographic Variation in Activity and Fatality of Migratory Bats at Wind Energy Facilities can be read at www2.allenpress.com/pdf/mamm-90-06-1341-1349.pdf.

Source:  Smoky Mountain News, www.smokymountainnews.com 17 November 2010

This article is the work of the source indicated. Any opinions expressed in it are not necessarily those of National Wind Watch.

The copyright of this article resides with the author or publisher indicated. As part of its noncommercial educational effort to present the environmental, social, scientific, and economic issues of large-scale wind power development to a global audience seeking such information, National Wind Watch endeavors to observe “fair use” as provided for in section 107 of U.S. Copyright Law and similar “fair dealing” provisions of the copyright laws of other nations. Send requests to excerpt, general inquiries, and comments via e-mail.

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