THis is quote a close up. I would have prefered a compostion that included the birds head. As it is I get the feeling the neck goes up and the head is just dangling their on a wire or something. On this screen the image is also very dark and little detail appears on the duck itself. While the DOF is good for this image more detail on the duck would really add to it. As for the background, what is causing the bright reflections. Those take away from the mood of the duck substantually in my opinion.
This is an excellent creature to take more pictures of and dramatize its natural characteristics. I would like to see something from the bird, emotion.... a story... something.