slaughter of crows

The collective noun for a large group of crows. When two or more murder of crows combine.

A slaughter of crows have taken over the neighborhood. They are in every tree and rooftop and when they take to the air they blot out the sun. The noise is unbearable and when they are at rest they get silent . Then, as one, they stare at you with dead, menacing, beady eyes.