The Bonaparte`s Gull continues to provide long-staying views—unlike the brevity of Saturday`s other American visitor. Oare`s muddy foreshore is favourite, where very short darting flights and determined gait seem to ensure an adequate supply of marine worms. The black bill is delicately pointed and not as robust as the Black-headed Gull. The narrow eye-arcs contrast with the near-black hood– (light dependent)—which from the rear is very similar to the Black-headed Gull in its depth towards the nape.
Mike Roser

Bonaparte`s Gull /Mike Roser