Greetings from the Critique club. First off I have to say you met the challenge great. And while its a difficult shot to get you were able to capture it, albeit with some flaws. I really like it for the challenge. Now on to what we can do to make it better.
Focus is off a bit. Not near as sharp as is required for Ribbon winning shots. Crop is good, follows rules of 1/3rds pretty well. I might have used a faster shutter speed for less blur of the moving wings, not sure if you had CAF on but if not that would have helped, and also during Post Processing, bumped the contrast to make it stand out. The background is a bit busy, but you cant really pose an Eagle however a different vantage point may have been possible. Overall I think the photo scored about where it should have considering the challenge and the small issues with the photo. Good job and keep shooting.
I wonder if a faster shutter speed would have produced a sharper image? If so, I think this would be all the better an image. Still impressive to have captured the wings as you did.