Welcome to the forum.
This is a good image of the duck and its reflection. It is well detailed and has strong colours in the plumage. I find the tree to be too dominant and there is too much empty brown space for me. I would like to see more duck. It is not always possible to get close enough to our subject especially water birds. Perhaps you could crop it to remove the excess and place the head of the bird closer to the left hand edge. Something along these lines. The resolution of the K7 should enable you to crop and maintain a reasonable image quality.