https://www.siliconvalley.com/2022/01/25/bay-area-wind-turbines-pose-threat-to-george-clooney-of-the-bat-world/

After undergoing sleek upgrades over the past two decades, the iconic wind turbines at Altamont Pass are killing a lot fewer birds.

But they’re still claiming the lives of another important creature of the sky: bats.