What do you call a grouping of Crows? A murder

Many birds live alone, but crows live in a group called a murder.

Most people would call it a Flock of Crows. One could think of a murder of Crows to be the "poetic term" .  The word for this grouping appears in the title of the short story  "Murders in the Rue Morgue" is a well-known short story by Edgar Allan Poe.

This is all things to the "collective noun". In fact a murder is not the only collective noun for a grouping of crows.
A horde, hover, muster, parcel are also listed as collective nouns for Crows. The most famous of them all is "a murder.

A collective noun is a noun that is singular in formal shape but denotes a group of referents. These are also called group nouns. Sometimes, usually in grammatical discussions, collective noun is also used to refer to plural-only words such as people or cattle.

It gets crazy when you start to look at all of the A collective nouns. Here are just a short list!

A "convocation" of Eagles
A "charm" of hummingbirds.
A "skulk" of foxes.
A "chattering" of starlings.
A "mustering" of storks.
  An "unkindness" of ravens.
A "seige" of herons.
A "leap" of leopards.
A "murder" of crows.
A "sloth" of bears

It can even get worse!
If the group of geese is flying, it becomes a "skein". If the geese are on the water, they're a "gaggle".

I would say if you saw a group of crows and you said look at the Flock of crows 99.9% of the people around you would not correct you. It is also odd that it is a murder of Crows but the ravens are only a unkindness. After all Ravens are the larger birds. Go figure!

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