Everglades Duck

Don't know what kind of duck this is. I took the picture in the Everglades. Just learned that you shouldn't feed ducks cause if you do they reproduce more quickly, causing the water's to fill with organic material which chokes off other wildlife in the wetlands.

BTW: I asked the Birdchaser over at http://birdchaser.blogspot.com/ if he'd be able to tell what kind of duck it is.