Came back to the boat the other day to bird shit...everywhere

Some bird had a bad case of diahrea and decided to use our boat as it's dumping ground. I spent the next hour washing the crap off. We have spent 8 days here and no bird has bothered us...but this day, while we were out...they made up for it. Marina did notice that it seems to be the Crows that are the culprits and not the Pelicans. The crows like to sit on masts and poop. The pelicans just fly around and head right back for the tree to do their business. We head to the hotel across the street to do our business. Those damn crows need a place.....