US Fish and Wildlife Service - Division of Migratory Bird Management - Loss of migratory birds at communication towers is estimated at 4-5 million annually. Potentially impacted resources include 90 bird species which are threatened or endangered and 124 non-game species of management concern.
Cellular News - US regulator to investigate cell phone tower deaths. (August 21, 2003)
Manila Bulletin - MIAA reinforces measures to control risks posed by birds to aviation/plane passengers. (August 21, 2003)
American Bird Conservancy - FCC Tower Petition Press Release. Environmental groups file petition demanding halt to all construction of communication towers in Gulf Coast, say threat to birds must be addressed. (August 27, 2002)
BusinessWeek - Hong Kong's birders are worried, too. (June 16, 1997)
Bird Calls - Tower Kills. Discussion on measures that can be taken to reduce avian mortality resulting from bird collisions with communications towers. (March 1, 1999)