Alisterus is a genus of medium-sized Australasian parrots, comprising the Australian king parrot (Alisterus scapularis), the Papuan king parrot (A. chloropterus) and the Moluccan king parrot (A. amboinensis). 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.

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