Rosellas are in a genus that consists of six species and nineteen subspecies.
These colourful parrots from Australia are in the genus Platycercus.
Platycercus means "broad-tailed" or "flat-tailed", reflecting a feature common to the rosellas and other members of the broad-tailed parrot tribe. Their diet is mainly seeds and fruit.
Rosella
Comparison of Platycercus heads in Gould's Synopsis (1837).
Green rosella in Tasmania. It is the largest rosella at 37 cm (14.5 in) long
Image: Platycercus caledonicus Melaleuca
A broad-tailed parrot is any of about 35–40 species belonging to the tribe Platycercini. The members of the tribe are small to medium in size, and all are native to Australasia, Australia in particular, but also New Zealand, New Caledonia, and nearby islands.
Broad-tailed parrot
An adult crimson rosella