The park has a ton of ducks that we feed when it's warm enough out. Mostly they are all mallards, but there is another kind of duck out there, and I've been wondering what the heck they are. They're all black, but they have a white patch on their chests. Any ideas? They could of course be mutts, I'm just curious. I've seen some that have the coloration of mallards, but with this white patch on them as well, which I'm assuming is a mix between the mallard and one of the black ducks. Anyways, I've never seen a black duck before we moved here, so, any ideas?