A friend had an overabundance of ducks and, happily, he passed a male and three females on to us. As they grew, we noticed that our male Muscovy duck had developed an unusual condition named "Angel Wing."
Angel wing also known as slipped wing, crooked wing, and drooped wing is a syndrome that affects aquatic birds, primarily geese and ducks, in which the last joint of the wing is twisted with the wing feathers pointing out laterally, instead of lying against the body. Males develop it more than females.
Most recent thinking on the cause of Angel Wing is that it is due to too much protein and too many sugars. The only wild waterfowl populations known to be affected are those fed by man.
According to Wikipedia, this condition renders the duck almost totally flightless. Luckily, if this this big boy proves to be a good breeder, he will live out his life with us.
Since he'll probably be staying, we're going to need a name for him.
Suggestions are welcome!