Mallards are so common but I've always admired that beautiful green head, especially in the right light. I think I should have had more dof here but I do like single blade of grass on the bill and the water drop. C&C encouraged and greatly appreciated.
Sharpness, angle and soft light look very good. I might put the bird a tad further to the right in the frame and if it were mine, I might remove the blade of grass on the bill.
Excellent job showing the green sheen. The light angle has to be just right to get it over most of the head.
Agree about the DOF. With the light you had, you could have traded a bit of SS for aperture.
It isn't always easy to do it in the field, but when you have an opportunity, try various settings after you get the first couple of shots in the can, and see what you can do with the image.
Another vote for removing the grass. I know its a bit different, but I would be inclined to remove it.
I'll go for keeping the grass - makes it a bit different than all the other mallard portraits;). Axel, I'm sure you meant putting the bird further to the LEFT? It's already pretty darn close to the right edge...