Even when resting, their head plumage stands up at a ninety-degree angle, like a brilliant white or black cap--yet another of the particular characteristics shared by both the White-Headed and Wu-T'ou Weng.
就連休息時頭頂羽毛會呈九十度豎立，形成鮮明的黑冠與白冠，也是烏、白頭翁共有的特徵。