The low angle on this is great. However, I think this would look better with a verticle crop, if you have the room. That way you can have more headroom above the duck and still have the reflection. I might also add a little selective sharpening to the head and tone down the whites in the beak.
I think the bird lower in the frame would work better. Some fill flash would help with the strong side light. I think a lower shooting angle would also improve this image. Good fopcus tracking on a bird that is moving fast towards you.