Zero impact is a fantasy. Best we can do is to make the impact as low as possible.
Bird strikes and wind turbines were a problem with older designs that spun faster, and siting early wind farms in migatory routes. They are less with newer turbines.
Now, how many people bringing up wind turbines and bird strikes have placed stickers or film on their home windows to reduce bird strikes there?
Yea, or you could ask if mass human life is more valuable than tiny fractions of animal life, given that power generation and the emissions from it, cause the deaths of around 52,000 US citizens per year, pretty much the same as that from road transport.