Alisterus is a genus of medium-sized Australasian parrots, comprising the Australian king parrot, the Papuan king parrot and the Moluccan king parrot. The three species are respectively found in eastern Australia, Papua, the Moluccas and other Indonesian islands. Predominantly of red and green plumage, the long-tailed parrots are related to the genera Aprosmictus and Polytelis.

The Australian king parrot is a species of parrot endemic to eastern Australia ranging from Cooktown in Queensland to Port Campbell in Victoria. Found in humid and heavily forested upland regions of the eastern portion of the continent, including eucalyptus wooded areas in and directly adjacent to subtropical and temperate rainforest. They feed on fruits and seeds gathered from trees or on the ground.