2,    adults,    anatids,    animals,    aves,    birds,    boles,    canards,    clouded,    clouds,    cloudy,    Dendrocygninae,    ducks,    flies,    flight,    format,    laterally,    outdoors,    outside,    red-billed,    summerly,    summertime,    summery,    sunny,    sunshine,    tree-ducks,    trees,    trunks,    waterbirds,    waterfowls,