Gulls have only one loyalty, like most other animals, and that's to food. They're clever like foxes but ever more bold.
Back in the early 1980s, down on Noyo beach, a local character I knew, Captain Greysquirrel, pointed out yonder and said, "You see that gull on horn, Jer? Watch, it's coming over here." That was Tony Staziack. Tony and I were catching surf-fish, (smelt) in Noyo bay using throw nets. Anyway, Tony took a smelt and held it high in the air, and from 300 yards away, halfway across Noyo Bay, that gull lit off its perch on the horn (foghorn), and on the wing it come and took that smelt out of Tony's hand. When I tried, that gull would not take flight for me.
Tony was in his 80s then, and his eyes were still good enough to recognize that particular gull from so far away. I was impressed.