Congrats on getting the shot you aimed for! You nailed the focus here! I really like the composition and colors! If it's still around, I would try to get some more shots after pumping up the ISO to 1600 to freeze the wings as 5D Mark III's ISO performance is awesome! May be you have more to come...
Great sharpness and nice eye contact. I don't mind the wing blur at all. I prefer the wings to be full up or full down, and I'm not crazy about the OOF vertical lines.
This is a fine image. I am really liking the motion of the wings against the sharp head, and how the wings appear to be framing your duck's head. While it may detract to some and maybe even at first to me, I find the BG works well colorwise with your duck and is quite unique. I do like the way the bird is angled slightly toward the viewer.