That croaks the fatal entrance of Duncan
Under my battlements.[144]
The Mallard
The Crows
Under the general name of CROWS Shakespeare seems to group the Carrion Crow, the Hooded Crow and the Rook, though the last-named is plainly distinguished in the description of evening when Macbeth tells his wife
Light thickens, and the crow
Makes wing to the rocky wood.[145]
Like the Raven, the Crows are often contrasted with something pure and white. Thus, in a striking simile, we learn that