Whenever my wife looks at this picture her first comment is that I have missed off the tips of the wings, which was not intentional. I do not think that this detracts from the picture although others may disagree.
I used my Nikon D80 with 80-400mm VR lens set to 340mm and shot hand-held with f11 at 1/640 (ISO 200). I was shooting from a low cliff-top beside a golf course and although it was my first attempt I obtained several flight shots that I was quite pleased with, mostly of Kittiwakes