Blue jays are bright blue on top, white or light gray underneath, and have black and white bars on their wings and tail ...

Polytypic. Length 11.5". A nearly unmistakable dark blue, black-crested jay with variable white or blue markings on the head. The wings and tail are a vivid blue, with fine black barring.

Juvenile: much grayer overall, showing very little blue on the head. Flight: Usually undulating with quick deep wingbeats. Both the Steller’s jay and the blue jay have conspicuous crests and ...