He's almost full grown, if I remember right, around 6 months old. Suspect not pure, as I had a Welsh Harlequin hatch from mama's eggs (1 out of probably 40 hatched from this particular hen) from a son (blue) to mama (black) mating, so I think there's some Welsh in the gene pool somewhere. Not super knowledgeable about duck genetics, so take it with a grain of salt. Anyways, he's lonely and has to hang out with the young'uns or solo, because daddy chases him away from the main flock.