Just a thought, but how about l@sers to target flocks and scare them away??
Scare them away? Not a chance. Years ago I was at a Guy Fawkes fireworks display in a country park. In the middle of the show, the biggest airborne bangs and flashes you can imagine, a flock of Canada geese was illuminated flying directly through the display and heading for the lake half a mile away. Their deviation due to the fireworks - absolutely nil.
Had I not see it I wouldn’t have believed it.