The U.S. Fish and Wildlife Service estimates between 4 and 50 million bird deaths are caused each year by the country's 105,000 communication (cell phone, television) towers.
"During bad weather, birds can mistake tower lights for the stars they use to navigate. They will circle a tower as if in a trance, often until they crash into the structure, its guy wires or other birds. Sometimes disoriented birds simply plummet to the ground from exhaustion. The fatally hypnotic effect of warning beacons on birds is not a new phenomenon; early lighthouses attracted swarms of birds. But as towers proliferate to accommodate an ever-growing number of mobile phones and other devices, conservationists say bird deaths are climbing."
- Jim Puzzanghera, Los Angeles Times, Nov. 27, 2006