Elsa, great image. It is the BG that does it for me. I also like the fact that you were able to capture the browns, normally the whites make it difficult to see the brown. I tried for years to catch the entire hoover, dive , strike and departure with/without fish, with a long lens. Finally dropped the focal length and shoot high speed on the D3S. Gave up the detail for the bird's behaviour

. Had to do the same thing for Paradise Flycatchers flitting out of bushes for bugs.
Thanks for sharing
Tom