1,    a,    adults,    anatids,    animals,    aves,    birds,    canards,    ducks,    females,    format,    lakes,    laterally,    mallards,    move,    movement,    moves,    outdoors,    outline,    outlines,    outside,    river,    Silhouette,    solo,    swimming,    swims,    waterbirds,    waterfowls,