Sorry that I mis-spelled the word "pigeon" . Just goes to show you that these pigeons have me all unglued . Someone off-line suggested to me that I use a 50-50 mix of everday common bleach and spray it on with a sprayer that attaches to your garden hose . Apparently, it works with racoons, too . The racoons -and- pigeons apparently do not like the smell/odor of the diluted bleach and fly off to "roost" somewhere else . I have a new tile roof, so I am hesitant to try the bleach approach for fear that it may bleach out my new red tile roof . JOHN