@DonFletcher Thanks Don, we are happy to help him with the grass, it's pretty good for this time of the year with all the rain we have had. We always have water available in normal bird baths and ones on the ground also. He can visit anytime and feel safe, we never go near to him and he always looks relaxed.
Do we have any other evidence elswhere online that the apparent underside of this moth matches S. rhodoxantha? To answer my own question:- Yes. possibly:- https://biocache.ala.org.au/occurrences/720fc486-f728-4706-af48-7f8a30e7aa63