The rook is the same size as carrion and hooded crows (Corvus corone
, and C. cornix
respectively). It has black plumage with a red-lilac gloss (2). Adults have a bare area of whitish-grey skin at the base of the bill, and a slightly 'peaked' crown (2). Immature rooks look very similar to carrion crows, especially as they have facial feathers and nasal bristles (5), however they can be identified by their straighter, more pointed bill (2). Vocalisations are hoarse and 'grinding' and a tremendous cacophony can be produced from large rookeries (2).