Towers Present Hazards to Migrating Birds
 
 
A recent article in Birder's World magazine reported on a study released by the American Bird Conservancy (ABC) which documented the killing of hundreds of thousands of birds at communication towers throughout North America. The list included 230 species of which 52 are on the U.S.Fish and
Wildlife Service's Non-game Birds of Management Concern List or Partners in Flight Watch List.

These are species in decline or needing special management attention. Ovenbirds lead the list with 22,619 tower kills; with Red-eyed Vireos, Tennessee Warblers, Common Yellowthroats and Bay-breasted Warblers having over 10,000 kills listed per species. The report notes that these numbers are likely understated since most carcasses are scavenged quickly and the majority of the nearly 50,000 lit towers are not monitored for bird mortality. The U.S.Fish and Wildlife Service has estimated that the 77,000 communication towers kill as many as 40 million birds annually in the United States.
 
The songbirds migrating at night are seemingly confused by the tower lights resulting in collisions. The report makes several recommendations designed to minimize bird deaths including placing multiple antennae on a single structure thereby reducing the number of new towers, reducing the height below 199 feet to avoid aviation safety lighting requirements and using lower intensity lighting.

     The entire report is available on line. It is titled Communication Towers: A Deadly Hazard to Birds

Other Sites of Interest:

http://migratorybirds.fws.gov/issues/tower

http://towerkill.com/issues/intro

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