grey herons
... that grey herons spend much time on the ground, striding about or standing still for long periods with an upright stance, often on a single leg?
... that <b id="mwBJg"><a href="./Grey_heron" id="mwBJk" rel="mw:WikiLink" title="Grey heron">grey herons</a></b> spend much time on the ground, striding about or standing still for long periods with an upright stance, often on a single leg?