I'll take your word for it then but you should get him breeding that's very very rare.There isn’t any set parentage for bps, Midas x synspilum is just the most likely. They do breed parrots to get more parrots, though I believe the males are often injected with hormones to raise fertility.
I didn’t believe mine would be fertile, but the eggs turned brown when they laid. Convict’s been eating all of the eggs, but the eggs show fertility beforehand.
It is one in a million, but it has been recorded. This one is simply one of those.