A rosella is one of five to eight species of colorful Australian parrots 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.
Ranging in size from 26–37 cm (10–14.5 in), rosellas are medium-sized parrots with long tails.The feathers on their backs show an obvious scalloping appearance with colouring that differs between the species. All species have distinctive cheek patches. Sexual dimorphism is absent or slight - males and females generally have similar plumage, apart from the Western Rosella.
Rosellas feed predominantly on seeds and fruit, with food held in the foot. They enjoy bathing in puddles of water in the wild and in captivity. Rosellas scratch their heads with the foot behind the wing.
Their diet is mainly seeds and fruit.
Their diet in aviculture includes seeds, fruit such as apple, pear, and grapes, and vegetable matter such as lettuce, grass, and silver beet.