Blue jay is mostly blue colored. Face, throat and belly are white. Wings and tail are covered with white, black and blue plumage. Blue feathers actually contain brown pigment, but they are equipped with special cells that distort light and create impression of blue color.

        Blue jay has crest on top of the head. Erect crest is a sign of aggression, while brush like crest is a sign of fear. Flattened crest can be seen in relaxed birds