2,    adults,    amities,    amity,    anatids,    animals,    aves,    Babies,    Babys,    birds,    canards,    chickens,    chicks,    clouded,    cloudiness,    clouds,    cloudy,    duckling,    ducks,    females,    fledglings,    format,    foster-mothers,    friends,    friendships,    hatchlings,    hens,    hybrids,    immatures,    indoors,    juveniles,    laterally,    layers,    mothers,    newborns,    size,    stands,    vertical,    waterbirds,    waterfowls,