Man-made structure/technology
Associated bird deaths per year (U.S.)
Feral and domestic cats
Hundreds of millions [source: AWEA]
Power lines
130 million -- 174 million [source: AWEA]
Windows (residential and commercial)
100 million -- 1 billion [source: TreeHugger]
Pesticides
70 million [source: AWEA]
Automobiles
60 million -- 80 million [source: AWEA]
Lighted communication towers
40 million -- 50 million [source: AWEA]
Wind turbines
10,000 -- 40,000 [source: ABC]