When I first got my house with a pool I had 30-40 pigeons sitting on my roof in the morning waiting turns to get a drink. Needless to say I had pigeon poop all over my deck and the pool/spa spillway. Also whenever it rained the pigeon poop from the roof would wash down onto my patio. After some research, this is the solution that I came up with. No more pigeons on the roof or by the pool. Thank goodness for silver party tinsel!