Dare I say I think the devil is in the asking, in particular the word you used. I think you are asking about an accepted position on the taxonomy of these birds but you asked us about an excepted position. Indeed that may be the answer. People accept whatever listing, except for other people who accept another idea………
Sorry about that.
Philip Veerman 24 Castley Circuit Kambah ACT 2902
02 – 62314041