續一切經音義 9.203

9.203

烏鷲（上鄔都反說文孝烏也純黑而反哺者曰鳥小而不哺者鵶也下疾溜反考聲云黑色鳥也從鳥就形聲字也）。

Raven and vulture (烏鷲: the upper character has the fanqie 鄔都; the Shuowen jiezi says it is the filial crow, purely black, that feeds its parents in return, called wu [鳥]; the smaller ones that do not feed in return are ya [鵶]; the lower character has the fanqie 疾溜; the Kaosheng says it is a black bird; derived from 鳥 with 就 as phonetic, a phono-semantic character).