I've seen the fight first hand and oh my its VERY SCARY! My husband broke them up by clubbing the big one in the head and then he and she came at him! The other one and family got away, finally. They keep coming back!!!! I couldnt believe it when I seen them come back. The other pair comes here often and he is very aggressive. If my husband wouldnt have jumped in and saved that swan, I know the bigger one would've killed him. I have so much more to say. Do you know how to stop this from happening? I can see everything from my window and I dont want to see that.