Northern Rosella
Platycercus venustus
Smaller than all rosella species except the western rosella, the adult northern rosella weighs 90 to 110 g (3.2 to 3.9 oz) and is 29 to 32 cm (11 to 13 in) long. It has broad wings with a wingspan of around 44 cm (17 in), and a long tail with twelve feathers. The sexes are almost indistinguishable, though some adult females have duller plumage and are more likely to have some red feathers on the head and breast.
ID text from Wikipedia, CC BY-SA 4.0
Western Rosella
Platycercus icterotis
The smallest species of its genus, the adult western rosella weighs 60 to 70 g (2.1 to 2.5 oz) and is 25 to 30 cm (9.8 to 11.8 in) long. It has broad wings with a 35 to 41 cm (14 to 16 in) wingspan and a long tail that is on average 13 cm (5.1 in), equally half the measurement of its total length. It is the only species of the genus that exhibits marked differences in the coloration of the sexes —the red of the plumage is more scarlet in male P. icterotis. Voice: The regular vocalisation is a rapid series of melodious notes delivered at a low volume. The vocalisation of sister species of other regions is notably louder and more frequently heard in raucous exchanges with other individuals or species.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Northern Rosella and Western Rosella.