Don't know if it would help in your situation but we used to hang "fake" owl decoys over our boat and it almost eliminated the sparrows & birds that would nest in the slip. We also hung blank CD discs from the rafters above the hot tub and that kept woodpeckers away. (this is when we were in TX)I would much prefer the owl poop to regular bird poop. The owl drops solid terms. About the size as a mouse. They have been really decimating the bird, mice, and rat populations. Got bird **** on everything!!! Its nasty. Have tarps everywhere. Gotta do something this year to stop their nesting.