IMO, yes, black duck mallard mix. The location says a lot too. There is some serious interbreeding going on, on the East coast. Shot many similar to that in Massachusetts. Some of these birds are 1st generation birds, however many are older generation birds breeding back to other mixed birds as well as plain mallards and plain blacks> because of this, you will get varying patterns in the head, the body as well as the wing. The speculum, body (breast color) as well as the head looks like a pretty even mix of the two parent species in my opinion.
Some people get all excited because they shot a hybrid. I just feel that this one has done more harm to both original breeds, and is quite common, so it isn't what I think of when referring to a trophy, but it definitely has some characteristics that may be wall worthy.