Ключевые слова: archipelago, beak, bill, bird, bjrkarholma, black, black cap, black eye, black head, common tern, dark carpal bar, dives, eye, fish, hover, hovering, hovers, long forked tail, long narrow pointed wings, long tail, long wings, marum, masterly flyer, orangered legs, pale grey, perching, plunging, redorange beak, redorange bill, rock, roslagen, sea, seabird, slender seabirds, slightly decurved bill, sterna hirundo, sternidae, stockholm archipelago, sverige, sweden, terns, uppland, watersurface, white cheeks, wild animals, wildlife,