a murder of crows Subjectcrow (crows)CategoryAnimals → BirdsConfidencehighAttestationwikipedia-cited, wiktionary-attested 5 sourcesWikipedia - List of animal namesOxford Dictionaries - What do you call a group of ...?Zoological Society of San Diego - Animal group namesWiktionary - murderWiktionary - Appendix:English collective nouns