WE have a small wind farm near here, and it is far from any forests, and I do not think they have killed any birds. It would be important to stay away from the routes bird use in migration, but those corridors are generally not right in the windiest locations.
If we followed the logic of never killing even one bird we would also have to ground all airplanes, and I dont think we are ready to do that yet.
My wife is an ecologist and we discuss this a lot. I understand that wind turbines can and do affect migratory bird patterns, however like all living things...they will adapt. I realize that everyday we take more and more natural habitat away, but I think as our dependency on oil decreases and we start using more efficient and sustainable methods to derive power, we can return and restore habitat.
No one can be 100% sure without actually doing something, and I'm sure we can all agree that the cost of NOT doing something is far greater than taking action...no matter what sustainable energy source we harness. I don't like to see animals die either, but oil tankers bursting open on rocky shores and fuel spills have killed far more animals then wind turbines ever have or probably will.
I worked in a building in downtown Dallas. I observed a bird that flew directly into the window of the building. The bird definitely died. Do we tear down all tall buildings with glass in all cities in the nation because they kill birds?
Of all the Wind farms I have been to I have only found one dead bird. I think the new turbines in use today are big enough that birds can see them The towers are big tubes that provide no place for birds to want to land and nest. The older turbines were on latice type towers and birds would nest in them. The older turbines also rotate much faster at the center and could be another cause.