2,    adults,    anatids,    animals,    aves,    birds,    canards,    drakes,    ducks,    eat,    eats,    females,    fodder,    forage,    format,    laterally,    males,    mallards,    move,    movement,    moves,    outdoors,    outside,    river,    search,    sunny,    sunshine,    swimming,    swims,    waterbirds,    waterfowls,