4,    adults,    anatids,    animals,    aves,    birds,    format,    grassland,    greenfield,    laterally,    meadows,    move,    movement,    moves,    outdoors,    outside,    pasture,    stands,    summerly,    summertime,    summery,    sunny,    sunshine,    swans,    swimming,    swims,    waterbirds,    waterfowls,