I basically like the composition but probably would have cropped it a bit tighter both left and right. You'll get at least 20 different crop proposals all of which contradict each other, so I'll leave it at that.
Main thing is to remove the green cast. Levels, Green channel, 0/0.87/255 comes fairly close.
Thanks, Dale, exactly what I was looking for. I saw something and could not put my finger on it. As for the crop, a matter of taste I would say. I would prefer to leave the main elements in the strong points.This looks a lot better. However it is not true to nature any more. The light had a greenish cast, as I can illustrate with the following photograph, that seagull has a strong reflected green on its belly caused by this light.
Leica M8, Tele-Elmarit 135/4.0