The western rosella (Platycercus icterotis), or moyadong, is a species of parrot endemic to southern Western Australia.

The population is classified as two subspecies, representing an inland group residing at the agricultural district and another nearer the coast in kwongan, tall forest and a variety of woodlands. The abrupt intersection of these groups' range, delineated by country of lower rainfall between Albany and Geraldton, is a zone of hybridisation between the two subspecies Platycercus icterotis icterotis and P. icterotis xanthogenys. The classification of the species relationship to sister taxa of Platycercus is less complex, due to their ecological and geographic isolation, and they are allied to a subgenus Platycercus (Violania) .