Pose, head angle, colours all look great. Very well balanced composition. Properly focussed but a bit noisy / coarse on the fine details it seems to me.
Hi Will, good techs and I like the overall comp. Agree with Dan about the plumage, did you lift the darks/shadows? I wonder if slightly raising the WB temp it may bring a tad of warmth to the image.
Hi Will, lovely low angle, and I like the hint of iridescence on the wings. I do like the yellow eye, and the colours of the BG compliment the duck nicely. I would maybe remove the smaller catchlight.