Confidence: I'm as sure as I can be.
Notes: The crown, nape and throat are black. The cheeks are white. The breast and belly are yellow with a black stripe down the centre. There is a white wing bar across the blue-grey wings. The back is a yellowish-green and the rump is blue-grey. Legs are grey-blue and the bill is black.
The sexes can be told apart by the width of the black stripe down the breast - the males have a broader stripe than the females.
Juveniles are paler and duller with yellowish cheeks and wing bar.