Well the austrolorp roo came from a hatchery that was selling hatching eggs and they were all supposed to be black Australorp. The roo pictured in there with the bright plumage was one of his offsprings that I can't account for any crosses that the parent might have had nor can I account for any crosses the mother may have had but the only hens I have that would account even remotely for The Coloring that you see are Rhode Island Reds ,buff orpingtons or speckled Sussex. I don't see speckled Sussex anywhere in him he is so much bigger than any Sussex I've ever seen I don't remember what a Rhode Island Red rooster looks like in recent memory. But with what I've supplied you with the only birds that were available for what is called a black Australorp roo, and the only hens available that could possibly have supplied the genetic material kind of limits the gene pool so I don't know if it's not orpington if it's not Rhode Island red if it's not black Australorp I can only tell you what the breeder told me the Daddy was.
Barry