4,    adults,    anatids,    atratus,    aves,    birds,    dives,    eat,    eats,    fodder,    forage,    format,    lakes,    laterally,    move,    movement,    moves,    outdoors,    outside,    search,    submerges,    submerging,    summerly,    summertime,    summery,    sunny,    sunshine,    swans,    swimming,    swims,    waterbirds,    waterfowls,