I wish we could have a closeup of the picture but basically i would venture to say he is a low to medium white pied. Patterning and amount of white is very variable in pieds too. To me, he is a little dark to be yellowbelly even the lateral and dorsal coloration. Then again he looks too light to be black pastel pied. Especially the head coloration. Totally imo and could definitely stand corrected. Amazing looking in any case. Grats.