[S-F]

Originally Posted by Xringer

Windmills stopped at night after bat death - BostonHerald.com

"LILLY, Pa. — Thirty-five windmills at a western Pennsylvania wind farm
have been silenced at night since a bat that belongs to
an endangered species was found dead under one of the turbines."

Can't they put ultrasonic whistles on the blades to keep the bats away? Like the whistles you can put on your front bumper to prevent deer from running out in front of you.