Difficult to recognize but I think that this is a male of superb bird of paradise, Lophorina superba, even when due to the light angle and appareance of the bird it doesn't looks like one. I hope I'm correct. Anyway I'm alliviated to see finally after a ton of photos for ID that I wanted to ID but I arrived too late, one where finally I can identify it before someone else!
@Kakapo I would be ecstatic if this is correct, as I was very disappointed to not have seen the superb bird of paradise in their aviary (this aviary had magnificent bird of paradise labelled, but only this bird and some fruit doves were visible)