black-headed gulls in winter plumage in kelsey park, beckenham trying to get bread

are avian beak beckenham bird birds birdwatching black blackheaded bread britain catch chroicocephalus closeup coast england environment feathers flight flying get greater gull gulls headed kelsey kent lake larus london natural nature ornithology outdoor park plumage pond ridibundus sea seabird seabirds seagull seagulls someone threw trying water white wild wildlife wings winter