2,    adults,    anatids,    animals,    atratus,    aves,    Babies,    Babys,    birds,    chicks,    fledglings,    format,    hatchlings,    immatures,    juveniles,    lakes,    laterally,    move,    movement,    moves,    outdoors,    outside,    river,    size,    summerly,    summertime,    summery,    swans,    swimming,    swims,    vertical,    waterbirds,    waterfowls,