Overall, a great shot. I particularly like the contrast in the black feathers, the water, and the excellent timing you have. It's hard to get that telltale water splash behind the bird's feet that really gives this a sense of action. I also like the vignette, was it intentional?
I think you may have a small room for improvement in the exposure of the white feathers. It's a tough balance, because you have such extremes in this shot, but given that white is the dominant color of the subject, I would probably have exposed about a half stop less even if that meant dropping some of the detail in the water.
Great shot, and thanks for sharing.
