2,    adults,    anatids,    animals,    aves,    beating,    beats,    birds,    canards,    drakes,    ducks,    flapping,    flaps,    lakes,    laterally,    males,    mallards,    move,    movement,    moves,    outdoors,    outside,    river,    swimming,    swims,    waterbirds,    waterfowls,    wing,