Every year, wind turbines around the world kill millions of bats and other flying animals that collide with their blades. Scientists from Tel Aviv University and University of Haifa have developed a drone that transmits ultrasonic signals and lights to induce bats to fly above the danger zone.

https://www.israel21c.org/a-drone-can-save-bats-from-terror-of-wind-turbine-blades/

https://english.tau.ac.il/drones_save_bats

https://www.youtube.com/watch?v=ZLoKeXzHaeY

https://zslpublications.onlinelibrary.wiley.com/doi/full/10.1002/rse2.316