[Baynative]

As slowly as those big blades turn, I can’t understand how they kill so many birds.

[nascarnation]

Tip speeds are typically 150-200 mph

http://www.aweo.org/windmodels.html

[MisterArtery]

I've wondered about this for a long time. The blades turn very slowly and eagles have incredible eyesight and are very manuverable. Probably BS from the animal rights crowd.

[gundog]

Power lines don’t move at all, and they kill lots of birds that fly into them.

[Osage Orange]

Turn way faster than you think...!!~!