Excellent detail, not only is the heron perfectly captured but the love the fish right below his foot. The coloring of the background makes the bird pop. About the only thing I would have changed is the crop. I would have done a tight crop of the left side to his body and added some additional space on the right side. Effectively moving the bulk of the bird out of the center of the shot, but putting his stunning head in a better place and really emphasizing the angle of his beak.