Sarah, the colours stand out very well from the high key. The ruffled feathers add interest, and I actually like the space on top. I do agree a lower angle would have been first prize.
Thanks everyone for the feedback. In answer to Randy's question about processing, I increased the mid tone contrast in Lightroom and brought up the dull gray of the water in Photoshop more of a high key effect.
I agree about the lower angle, but I just couldn't figure out how to get it without spooking the duck.