Our forest bats are nocturnal creatures that navigate by sonar, not by sight. And apparently they are only attracted to the blade motion when they’re spinning at slower speeds. So preliminary studies suggest that many if not most bat deaths could be prevented by having the turbines shut down below a certain wind speed threshhold. (We’d probably know a lot more by now, but the wind industry in the U.S. has been highly uncooperative with independent researchers.) I am not sure what the implications might be for smaller, backyard turbines such as your site promotes.