The Red-rumped Parrot, also called the Red-backed Parrot, is one of Australia's grass parrots/parakeets, from southeastern Australia.
The male (above) has a red back/rump, yellow belly and some turquoise/blue in its green and grey plumage.
The female Red-rump (above) does not have a red back/rump and is an olive green and grey parrot, similar to some other female grass parrots, with blue in her wing feathers.
Several colour mutations have been bred in
aviculture -- see links below.