Rosella (Platycercus Vigors) Parrots belonging to this genus are collectively known as the rosella and all show two plumage characteristics; well-defined cheek-patches and a pronounced "mottling" on the back. The rosella is a medium-sized bird with long, gradated tails. There is a notch in the upper mandible. The male has noticeably wider, heaver upper mandibles than the female. In all but one species (icterotis) the rosella sexes are alike in plumage. The white, under wing-stripe is present but is variable according to the species. There are eight species of rosella:
o Crimson Rosella
o Eastern Rosella
o Green Rosella
o Yellow Rosella
o Adelaide Rosella
o Pale-headed Rosella
o Northern Rosella
o Western Rosella
The adult Crimson Rosella has a general rich crimson plumage; cheek patches violet blue; feathers of nape, back and wings black broadly margined with crimson. The bill is grayish-white; iris dark brown; legs grey.
The Crimson Rosella occurs in eastern and south-eastern Australia
In eastern Australia the Crimson Rosella is a bird of the coastal and adjacent mountainous forests from sea level to the alpine woodlands above 1,900 meters. It is plentiful, even occurring in numbers in the outer suburbs of large towns and cities. The flight is more undulating and noticeably slower than that of the Green Rosella and normally flies close to the ground and glides upward into a tree. The tail is fanned when alighting.
The diet of the Crimson Rosella is seeds, fruits, blossoms, and insects and their larvae.
Its call is a low pitched "kweek...kweek...kweek", with the middle note on a lower scale. When alarmed the Crimson Rosella has a series of shrill, metallic screeches. A soft chattering generally accompanies feeding.
The courtship display and general nesting behavior of the Crimson Rosella closely resembles those of the Green Rosella.