The pretty Red-capped Parrot, also called Red-capped Parakeet, comes from Australia and is related to the Rosella parakeets. Also known as the Pileated Parakeet, that name is usually applied to the South American Pileated Parrot.
The adult male Redcap with full red cap, yellow neck and blue-grey front
A young male Redcap above, he has the blue front of the adult male but has not yet developed the red cap and yellow neck.
Another young Redcap above has the bluey-grey front of the adult female and juvenile but has yet to develop the red or partially red cap of the adults.
The adult female (above) often has a partially red cap infused with green as well as a less yellow neck. Both have yellow rumps.
The Latin name of the bird includes a first word half-Latin/half-Greek meaning purple head and a second word "spurius" meaning "illegitimate" since the juvenile (above right) looks so different from the adults.
The Redcap's relationship to the Rosella family can be seen in the similarity of the broad, blue-green tail above.