flock of crows; murder of crows
Archaic term for a group of crows. In modern Japanese, カラスの群れ is the usual expression.
The word 群烏 can be found in old documents.
Standard kanji spelling for this archaic term.
Variant kanji spelling using 鴉, an older character for crow.
Compound of 群 (むら, 'group') and 烏 (からす, 'crow'), with rendaku voicing. The exact historical derivation is uncertain, but the word follows a common pattern for collective nouns.