These photos were taken about 14 March 1995 at Hatteras. They show a strikingly large Lesser Black-backed L. fuscus. In life the size of the bird was even more striking than on these images. It was larger than most of the surrounding Herring Gulls and holds its own next to the Great Black-backeds. The legs were yellow, not especially bright. The primary extension beyond the tail seems too long for graellsii and the white wing tips are rather small for graellsii. I expected it to be a hybrid, perhaps HEGU X LBBG, but the mantle seems a bit dark for that, and the wings in flight show a typical graellsii wing, with at most a small dot on P4. The bill is not especially massive. All in all, there seems to be little reason to suspect heuglini, but I know little about that form. At the moment I'm calling it an extremely large male graellsii.