A genus of medium-sized Australasian parrots, combining 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.
Medium-sized parrots, 35–43 cm (14–17 in) in length with long, broad tails. They have relatively small beaks for their size. The beaks of the adults are two colours, blackish and orange-reddish, except for the subspecies of the Moluccan king parrot, Alisterus amboinensis buruensis, which has a grey-black beak, and female of the Australian species, Alisterus scapularis, which has a grey beak.