This is a big crop, 25% of FF, but I thought it held up pretty well.
Taken near the Bodie Island Lighthouse on North Carolinas outer banks. Sony A700, 70-400G @400mm, f11, 1/640, iso400, -0.3ev. Levels and sharpen duck.
Hi Peter. You got a nice look from this pintail. Good head turn, and raised tail. colors and sharpness look good although the eye looks a bit soft. The large crop did hurt the IQ, and a lower shooting angle might have helped. (The latter often troubles me, since it's not always possible.)
For 25% I think it held up better than expected but it's nowhere near what a full frame image would look like as far as clarity. Once you get down in the 50-70% range you start to really lose EQ and if you look closely (or try printing this in an 8x10 size) I think you'll see the difference.
You did get a very nice pose/HA and the exposure looks good - both the whites and blacks are in check.