Ключевые слова: auk, auks, balance, beak, bill, bills, bird, birds, coast, coastal, colonies, colony, feather, feathered, feathers, feet, genus, grey, gull, gulls, habitat, habitats, head, headed, large, laridae, larus, markings, nest, nesting, nests, plumage, sea, seagull, seagulls, silver, skimmer, skimmers, sternidae, tern, terns, wader, waders, webbed, white, whiteheaded, whitewinged, wing, winged, wings,