Angry bird...?

If you look carefully you can see that there are three mallards; a male and a female ones who are a couple and another male mallard attacking the female one... No idea what this was about but it was not any nice behavior. However, the aggressive mallard became disturbed when I came close to the fighting place and decided to leave.

Edit: This is the second version made via RAW/Lightroom. Much better than the first one via jpg/Picasa...