The genus Quoyornis is possible monotypic taxon with a single species - White-breasted robin
The White-breasted Robin (Eopsaltria georgiana) is a passerine bird in the Australasian robin family Petroicidae and the Yellow Robin genus Eopsaltria. Occasionally it is placed in the genus Quoyornis. It is endemic to southwestern Australia. Unlike many other Australian robins, it lacks bright colours in its plumage, being a predominantly greyish bird with white underparts. Like other closely related Australasian robins, it is a cooperative breeder. It is sedentary, with pairs or small groups maintaining territories.
The White-breasted Robin is found in Western Australia south from Geraldton to the southwest corner of the continent. Within this area, it is mainly restricted to two areas of different habitat. In the main southern part of its range, it is found in an area bounded by Jarrahdale and Woorooloo on or east of the Darling Scarp, and south-east to Beaufort Inlet. Here it occurs in tall forest dominated by karri (Eucalyptus diversicolor), where it is found in dense undergrowth of such plant species as karri hazel (Trymalium odoratissimum subsp. trifidum), karri she–oak (Allocasuarina decussata), and nedik (Bossiaea aquifolium), typically along rivers and gullies. It also inhabits dry sclerophyll forest of karri, jarrah (Eucalyptus marginata), and bull banksia (Banksia grandis), where it lives in the 2–3 m high understory. The northern population is found along a narrow band from Geraldton south to Yanchep National Park, where it lives in coastal thickets—often covered in dodder—of Acacia rostellifera, Acacia cyclops, Melaleuca cardiophylla growing over sand dunes on limestone soils. It is sedentary, with pairs or small groups maintaining territories in its range. Young male birds remain around their parents' territories as helper birds for around a year, while females disperse.