A group of ravens is called an "unkindness," but there are several other collective nouns used as well, including a "conspiracy," a "treachery," a "rave," and more generically, a "flock" of ravens

. The term "unkindness of ravens" originated in the 19th century and likely stems from misunderstandings about raven behavior and their association with bad luck and trickery in mythology

. Despite these negative connotations, ravens are intelligent, social birds that form complex social structures and can work together cooperatively

. In summary, the most distinctive and traditional collective nouns for a group of ravens are:

• An unkindness of ravens
• A conspiracy of ravens
• A treachery of ravens
• A rave of ravens
• A flock of ravens (common, neutral term)