I have seen these birds fight over real estate many times , but only for very short periods. These 2 went at it for a good 60 to 90 seconds , which is a very long time. Must have been a good spot to fight over.
400ISO f5.6 at 1/2500th
Cropped for posting about 40%
Joe, good action captured, and the guy at the back looks like he's on top of things with regards to who's the boss. I would maybe take a bit off the top.
Nice interaction captured Joe, I like the way the water goes on a soft diagonal through the image. I wish we could see a bit more of the front of the other bird-but I guess the one is not letting go.:)