Hi Steve! BG is a bit distracting, but love the reflections in the water. Good control of noise with your 20D at ISO 1600. Sharpness is likewise good considering the stacked TCs. PS3 is a worthwhile investment for any serious bird photographer, but the latest version of Elements isn't half bad.
One sharp image stacking !!!! Like your long lens technique !!!
Would place a bit more to the left of the frame and try blurring the bg a little more. Do be careful so it looks natural. Did you make an image with him swimming like a duck? Haven't seen that !!!
Steve, thanks so much for showing this guy swimming. I've never seen that before.
The background is really beautiful but does take away from the bird a bit.