22.5 - 29.0 cm. 176 - 242 g. Body brilliant green. Yellow eyes with a gray line around the eye. A red mask beginning in the bill and around eye. White nape and blue nape. Strong, hooked yellow bill. Flight feathers blue-violet. Tail green, with external feathers red that can not be seen when perched. Grayish legs. Males and Females different. Male: In flight a big red patch can be seen in the external feathers above the flight feathers. Female: Females lack the red patch in the wing area. Juveniles resemble females but have a reduced red mask.