As well as a pair of red-winged parrots on two platforms on the left. Still, I don't think this would be a suitable mix.
Prior to the revitalization, they only have red bird-of-paradise and lesser bird-of-paradise (Unsigned, free-fly). I think they also brough in some twelve-wired bird-of-paradise and magnificent bird-of-paradise (The latter are kept off-display pre-revitalization and after that was only signed, but not present).
Did you and @twilighter notice other birds-of-paradise other than p. rubra?
@Rizz Carlton Going through my photos of signs, I have recorded that the Bird Park has only Red Bird of Paradise and Lesser Bird of Paradise. I don't recall any other species.