I've been having raccoon issues. It took us a couple weeks to figure it out, as there was no blood, no bodies, no pieces of anything, just a few extra feathers than normal and birds missing. I think they've been my big predator all season long. We lost 6 ducklings of various ages, a pekin duck, a couple of chickens, and even a half-grown gosling. They are apparently out in force this year.
Must domestic ducks can't fly, just muscovy and mallards, I think.