Aphelocoma jays are slightly larger than the blue jay and differ in having a longer tail, slightly shorter, more rounded wings, and no crest on the head. The top of the head, nape, and sides of the head are a rich deep blue. Some species have a white stripe above the eye and dark ear coverts. The breast is also white or grey-white and the back is a grey-brown contrasting with the bright blue tail and wings in most species. One species, the unicolored jay, is blue all over, superficially similar to the pinyon jay from much further north. The bill, legs, and feet are black.