4,    adults,    anatids,    animals,    atratus,    aves,    Babies,    Babys,    bird-nests,    birds,    bough,    boughs,    branches,    breeding,    chicks,    fledglings,    format,    hatchlings,    immatures,    juveniles,    laterally,    leafage,    leaves,    limbs,    nests,    outdoors,    outside,    sits,    sitting,    summerly,    summertime,    summery,    swans,    twigs,    waterbirds,    waterfowls,