Rook
a European species of crow (Corvus frugilegus, Linn.), resembling in size and color the carrion crow, but differing in having the base of the bill whitish and scurfy, and bare of feathers.
The rook is gregarious at all seasons, resorting constantly to the same trees ROONEY every spring to breed. After their young have taken wing, they all forsake their nest trees, returning to them again in October to roost; but as winter comes on, they generally select more sheltered places at night nearby, to which they fly off together.