A good rule of thumb for # of subjects, is to have odd numbers... 1/3/5 etc.
The exposure on the birds is a bit off. Its tricky to capture good exposure on these because of the white feathers, but make sure to exposose FOR the white feathers, as it is easier to fix an underexposed part of your photo rather than trying to fix blown out highlights.
I feel the composition could be better, theres no real "wow" factor.
I think those might be geese...or did you do that on purpose so that you could get tons of comments!? Hee hee!! I asked because I've considered doing something like that myself! Ok confession is over. Decent shot. I think it's possible a wider crop would have served you well but of course I have not seen the original.
Nice capture with this one, but I really think it is important for the eyes to be in focus if you are photographing animals. I would like to see a wider DOF, so both ducks are in Focus