adults,    anatids,    animals,    aves,    birds,    eat,    eats,    feeds,    fodder,    forage,    format,    humans,    lakes,    laterally,    move,    movement,    moves,    outdoors,    outside,    peoples,    Person,    persons,    river,    search,    swans,    swimming,    swims,    the,    waterbirds,    waterfowls,