I've had this ongoing problem with pigeons roosting on our neighbours window sills. They're noisy, and unclean.
I decided I'd use a diverter with a strong light at the attic level,hoping the light would change every half an hour and disturb their sleep, driving them away.
I've been up one and a half hours earlier since the idea backfired.
The light woke me, it reflected down off the wall to my room on the second floor.
Time will tell if I'm up since I'm enthusiatic about life and wanted to just wake up early...or it's...Back to the drawing board