There appears to be no documentation available on this language. Tindale (1974) lists a word list compiled by Muirhead, 'Belyando River', in Curr (1887) under Wangan. However, Breen (forthcoming paper on Biri) identifies this as Yangga E52.
Breen also reports that Holmer (1983:368) gives Wanggan as the Aboriginal name for Clermont, and as a result Breen suspects that Wangan may not be a language name.
Capella north to near Blair Athol; east to Peak Ranges; west to Drummond Range; at Peak Downs (Tindale 1974).
Speaker numbers were measured differently across the censuses and various other sources listed in AUSTLANG. You are encouraged to refer to the sources.
Speaker numbers for ‘NILS 2004’ and ‘2005 estimate’ come from 'Table F.3: Numbers of speakers of Australian Indigenous languages (various surveys)' in 'Appendix F NILS endangerment and absolute number results' in McConvell, Marmion and McNicol 2005, pages 198-230 (PDF, 2.5MB).