expression, noun
sharp eyes; keen eyes; vigilant attention
Idiomatic expression likening someone's watchful, searching gaze to that of a cormorant and a hawk. Often used in phrases like 鵜の目鷹の目で探す (search with sharp eyes).
彼女は鵜の目鷹の目で間違いを探した。
She searched for mistakes with sharp eyes.
警察は鵜の目鷹の目で証拠を集めている。
The police are gathering evidence with keen eyes.