4,    adults,    animals,    aves,    Babies,    Babys,    barns,    beaks,    beating,    beats,    bills,    bird-nests,    birds,    breeding,    broods,    calls,    chicks,    cries,    cry,    feeds,    flapping,    flaps,    fledglings,    format,    hatchlings,    husbandries,    immatures,    indoors,    juveniles,    laterally,    nestles,    nestlings,    nests,    open,    Passeri,    scream,    screams,    shouting,    shouts,    song,    songbirds,    stables,    swallows,    to,    wing,