白头鹀 【pinyin: bái tóu wú 】 (bird species of China) pine bunting (Emberiza leucocephalos) 白头偕老 【pinyin: bái tóu xié lǎo 】 (to live together until the) white hairs of old age (idiom); to live to a ripe old age in conjugal bliss until death do us part.