[Slicksadick]

- Vehicles: 60 million - 80 million - Buildings & windows: 98 million - 980 million - Power lines: 10,000 to 174 million - Communication towers: 4 million - 50 million - Wind turbines: 10,000 - 40,000

Note that above numbers do not include domestic cats and their damage..

I found a number on cats, 150,000 killed per day by cats in Great Britan alone.

[bwteim]

So that makes approx. 150,000 x 365 = 54,750,000 in GB

And "University of Wisconsin researchers found that cats kill an estimated 19 million songbirds each year in that state alone"
http://www.windstar.org/features/clearinghouse/a_freecats.htm

and 50 states X 19 mil = near a billion or so....
which is amount that Straight Dope says: "Cats kill an estimated one billion birds a year in the U.S"

http://www.straightdope.com/columns/010831.html

You'd need a lot of wind mills to come up equal to that number.

[TenthAmendmentChampion]

I found a number on cats, 150,000 killed per day by cats in Great Britan alone.

My cat does her share... about a bird every two weeks.