Well done, 3 subjects makes for a well balanced composition. Actually I like the fact that the last bird has a slightly different wing position. If they were all identical it would looks contrived or manipulated (photoshoped).
Very nice image, great detail in the undersides of the wings...correct me if i'm wrong, but closer inspection should reveal that the image is "contrived or manipulated"...two of the ducks are duplicates...so maybe double vision + 1?
Still a beautiful image, just thought i'd point this out as it was not mentioned anywhere and no one else seemed to pick it up.