This was photographed with a Canon 7D and a Canon L 100-400 mm. lens This was at Neenah,Wisconsin on 2-25-2013.This immature American Bald Eagle is trying to get a fish from the adult American Bald Eagle.After watching eagles do this many times i believe it is more of a teaching rather than an all out attack! The adult could simply reach down and eat the fish in flight rather then bothering with this kind of antics yet it does.I have witness eagles getting knocked down into the river on 2 occasions doing this very act.Again i do not think that is what was meant to be but this is just my opinion and may not be correct. As you can see the immature eagle looks very intense and the adult is just keeping an eye on what is going on. After a very short while the adult did reach down while in flight and eat the fish while flying.