I have, (had), a serious pigeon problem around my home. The woman across the street feeds every damn stray bird and cat that comes around. So I had pigeons crapping everywhere. I found a good way to get rid of them. I read they hate the smell of mothballs, and can detect it from a long distance away. So I bought a bunch of those plastic mothball containers you fill with mothballs, and hang in your closet. I filled them and placed them under the eves where they tend to congregate, and near the water discharge pipe for my central air. Since then I have not had one single pigeon anywhere on my property! I see them on the neighbors roof tops, but not on mine. In the hot weather you have to refill them more often because they evaporate faster, but it's worth the effort to not have to constantly be hosing off pigeon $h!t. I also had stray cats crapping along side my house. Since I put out the mothballs, I haven't had a single cat crap in my yard. I like this better than using any type of poison because it can't get into the food chain, and harm innocent pets and other animals. It just gets rid of them!