1,    a,    adults,    animals,    aves,    beating,    beats,    birds,    common,    flapping,    flaps,    format,    gulls,    lakes,    laterally,    mirrored,    mirroring,    move,    movement,    moves,    outdoors,    outside,    quadrat,    quadratic,    river,    seagulls,    shorebirds,    solo,    swimming,    swims,    wing,