Hello All Nonsucher's..
I have been troubled by [at least one] Night Hawk, who loves to deposit his dinner on my dodger, deckhouse & foredeck. While I have been a target shooter for many years, I've suppressed the desire to eliminate the creature. However, a more PC approach has worked.
My 30C has two halyards, one formerly for spinnaker use! Hanging two deco flags on both halyards, fixing the bitter ends to the wishbone port & stb'd, WORKS ! !
I recommend the technique. Should it not be successful this season, I have another potential solution from . . . S&W.