2,    adults,    animals,    aves,    beaks,    beating,    beats,    bills,    birds,    calls,    cloud-free,    cries,    cry,    flapping,    format,    laterally,    open,    outdoors,    outside,    Passeri,    scream,    screams,    shouting,    shouts,    song,    songbirds,    sunny,    sunshine,    supply,    swallows,    wing,