2,    adults,    anatids,    animals,    aves,    birds,    canards,    dive,    dives,    drakes,    ducks,    feeds,    fodder,    forage,    format,    lakes,    laterally,    males,    mallards,    outdoors,    outside,    river,    search,    submerges,    submerging,    the,    waterbirds,    waterfowls,