A flock of crows is called a "murder". A flock of ravens is called a "conspiracy", a "treachery" or an "unkindness". English is weird. The raven and the crow got together for a chat two black shadows against a dying sky. "How is your murder?" asked the raven. "The same old same old nothing but arguments all the same." "And how is your conspiracy?" asked the crow. "You mean my treachery?" replied the raven. The crow cawed in grim humor: "Did you rename yourselves?" The raven laughed and answered "No, it means the same thing, you know." "Well, whatever, are they doing well?" The raven bobbed its head. "Well, enough, although Mother complains, same old, same old." After a little more chit-chat the raven and the crow go back to their families: one a murder, the other a treachery.