Any one of the numerous species of birds belonging to Garrulus, Cyanocitta, and allied genera of the family Corvidae. They are allied to the crows, but are smaller, more graceful in form, often handsomely colored, and usually have a crest.
The jays are several species of medium-sized, usually colorful and noisy passerine birds in the crow family Corvidae. The names jay and magpie are somewhat interchangeable, and the actual evolutionary relationships are rather complex. For example, the Eurasian Magpie seems more closely related to the Eurasian Jay than to the Oriental Blue and Green Magpies, whereas the Blue Jay is not closely related to either.