《汉书·志·五行志中之下》
鸜鹄，是夷狄地区穴居的禽类，来到中原，不穴居而筑巢，是阴居阳位，象征着季氏将要驱逐昭公，离走宫室而退居外地。
雊鹆，夷狄穴藏之禽，来至中国，不穴而巢，阴居阳位，象季氏将逐昭公，去宫室而居外野也。
The stork hoopoe is a bird from the YiDi region that digs holes in which to live. When it came to the Central Plains, it did not dig holes but built nests, which was yin dwelling in a yang position, a symbol of the Ji Clan’s imminent expulsion of Duke Zhaogong, his escape from the palace, and his removal to another country.