The Gilbert's whistler (Pachycephala inornata) is a monotypic species of bird endemic to Australia, scattered in semi-arid zones of southern Australia.
The adult male, which weighs 29.8-32.5 g, possesses a rufous coloured chin and throat from its third year of life, as does its most likely closest relative, the red-lored whistler. Both males can easily be differentiated by the colour of their lores: black for the Gilbert's and red for the red-lored whistler. The female Gilbert's whistler has a pale grey throat and a white ring around the eye; her underparts can be lightly streaked. Both sexes are uniformly brownish-grey, and have a red iris and a black stubby bill. Juveniles are darker than adults, with tinges of brown, and have dark streaks on the breast and belly. Immatures are very similar to adult females except for their brown bill and dark brown iris. Care should be taken not to mistake the female and immature Gilbert's whistler for the female golden or western whistlers where they co-exist.