adults,    anatids,    aves,    bicolor,    bicolour,    birds,    black-white,    format,    lakes,    laterally,    move,    movement,    moves,    outdoors,    outside,    summerly,    summertime,    summery,    sunny,    sunshine,    swimming,    swims,    two-colored,    two-coloured,    waterbirds,    waterfowls,