2,    adults,    animals,    aves,    beating,    beats,    birds,    bough,    boughs,    branches,    clouded,    cloudiness,    clouds,    cloudy,    firs,    flapping,    format,    laterally,    limbs,    outdoors,    outside,    Passeri,    shrikes,    song,    songbirds,    trees,    twigs,    wing,