Hi Oscar,
I like the capture, the image is a tad under exposed, the blacks are lacking details and the eye area is too dark...would suggest adjusting the mid-tones, and adjusting the black point, open up the area around the eye and selective sharpen it...I like the raised wing position and the bill scooping the water...looking forward to your next one...:cool:
This is a tough one Oscar Exposure is not bad at all Might try giving the bird more room and making a little smaller in frame so you don't have to worry that much about detail.
With your tech settings and distance you had a chance at using flash ... helpful in all of these and neat effects can be achieved !!!