Dave your swan story reminds me of when I was chief mate on a cattle boat (excursion boat...) a wooden working boat from 1910, a ketch used for dredging oysters... but I digress. Genie and I would be awakened by someone pacing the deck at night. and in the morning there would be HUGE bird droppings. It was a big ugly brown oily Greeb, who considered the boat his own. Like you, I could live with the heavy pacing, but the bird crap was impressive, but then again, the boat, being wooden, had to be washed down several times a day anyway... but swan crap in the cockpit, I can just emagine...
wasail
Larry