Pigeons and Ducks.... Ha. I wish that was the extent of bird problems at my families marina. We have those lovely beautiful Geese. You know, the ones everybody takes pictures of as they fly over and swim by. Bet these people never had to deal with all the crap the geese leave around. We have to clean up the docks daily and you need to mow the lawn to get rid of it there. 50 Geese make a huge mess.