What detail you brought out! The bokeh is a little weird -- almost looks like the head doesn't belong to the body... I really like the smooth texture on the beak.
You posted this a while ago so who knows what kind of adjustments have been made since then. I loooooove how the head and neck look. What a pose you captured! It seems as tho it is being a little coy with you lol. The only thing I'd like to see is less blue on the body. For me, it takes away from the look and the beads of water on the head. What a beautiful shot!
Wonderful effect on the head and neck. I think Robert's idea of using the original body and background is a good one. He said something about clipping the head and neck. I think I would just use a mask to hide the topaz effect where you don't want it.