I had some starlings building nests in soffits of my old garage...a buddy gave me an owl decoy to try and keep them away. It did not work - they would even perch on the decoy. It might work on other birds or animals but not the starlings lol

The moving decoys would probably work much better than the stationary variety

Mat Peirce
1.25 acre southeast Iowa pond
LMB, BG, YP, WE, HSB, RES, BCP