We are losing our birds because we have taken away their homes and their food and filled their world with dangerous obstacles that take a terrible toll. Remember those 4 million miles of U.S. roads? Vehicles using them flatten birds daily, resulting in 50 to 100 million deaths per year (U.S. Fish & Wildlife Service 2002). Then there are buildings along the roads—often tall and always window-filled buildings. Each year as many as 1 billion birds are killed when they fly into the windows of those buildings (Klem 1990).
