One of the 'grass parakeets' of Australia, is also sui generis (same as quakers and the green ground parrot - I don't know of any other parrot species that is but there might be more as I don't know that many) and a BEAUTIFUL bird! I have always been intrigued by its scientific name because although the genus, Purpureicephalus, is pretty easy to figure out -they do have a red head - I can't figure out why the species itself is called 'spurius' which means false or illegitimate (?)
Look at this picture: https://focusingonwildlife.com/news/wp- ... rius-3.jpg
https://en.wikipedia.org/wiki/Red-capped_parrot
https://www.beautyofbirds.com/redcappedparrots.html