Grey Heron Preening Itself While Standing On Yangjae Stream With Flowing Water

grey heron ardea cinerea heron egret avian preening preen bird beak wildlife wading head animal longlegged habitat fauna nature environment yangjae river flowing predatory grooming feather standing flow wing natural water grey wild itself stream closeup south korea south gray stand freedom korea close up yangjaecheon behavior nobody seoul outdoor no people yangjae stream