They are distinguished from the other black cockatoos of the subgenus Zanda by their significant sexual dimorphism and calls of the juveniles one a squeaking begging call, the other a vocalization when swallowing food. The red-tailed black cockatoo's closest relative is the glossy black cockatoo the two species form the subgenus Calyptorhynchus within the genus of the same name. In the language of the Bungandidj of south-eastern South Australia and western Victoria this bird was called treen. Karrak is a Noongar term derived from the call for the southwestern race C. In Central Australia, southwest of Alice Springs, the Pitjantjatjara term for the subspecies C. (The bracketed prefix ( inh- or minha) is a qualifier meaning 'meat' or 'animal'.) Ngarnarrh or karnamarr are terms used by the Kunwinjku of Arnhem Land. Indigenous people of the central Cape York Peninsula have several names for the bird: (minha) pachang in Pakanh (inh -) inhulg in Uw Oykangand and (inh -) anhulg in Uw Olkola. Alternate common names include Banks' black cockatoo, Banksian black cockatoo, or simply black cockatoo. The binomial combination had already been used by Carl Linnaeus for the lesser vasa parrot in 1758, and by Johann Friedrich Gmelin for the palm cockatoo in 1788 it was thus invalid even though both other species were already known by different names at the time. In 1827, Jennings proposed the name Psittacus niger for the bird. The change was first made by Anselme Gaëtan Desmarest in 1826. The red-tailed black cockatoo is the type species of the genus Calyptorhynchus, the name of which is derived from the Greek calypto-/καλυπτο- "hidden" and rhynchus/ρυγχος "beak". In 1994, an application to conserve Calyptorhynchus banksii as the scientific name was accepted by the ICZN. For several decades, Mathews' proposal was accepted by many authorities, although it was unclear whether the original Port Jackson reference had actually referred to the red-tailed black or, more likely, the glossy black cockatoo. For many years, the species was referred to as Calyptorhynchus magnificus, proposed by Gregory Mathews in 1927 as Shaw's name had predated Latham's 1790 description. Narrowly predating Latham, English naturalist George Shaw described Psittacus magnificus from a specimen collected somewhere in the Port Jackson (now Sydney) region. The red-tailed black cockatoo also has the distinction of being the first bird from Eastern Australia illustrated by a European, as a female, presumably collected at Endeavour River in north Queensland, was sketched by Banks' draughtsman Sydney Parkinson in 1770. The species complex was first described by the ornithologist John Latham in 1790 as Psittacus banksii, commemorating English botanist Sir Joseph Banks. Of the black cockatoos, the red-tailed is the most adaptable to aviculture, although black cockatoos are much rarer and much more expensive in aviculture outside Australia. Populations in southeastern Australia are threatened by deforestation and other habitat alterations.
They are seed eaters and cavity nesters, and as such depend on trees with fairly large diameters, generally Eucalyptus. In the more northerly parts of the country, these cockatoos are commonly seen in large flocks. The species is usually found in eucalyptus woodlands, or along water courses. Although the more northerly subspecies are widespread, the two southern subspecies, the forest red-tailed black cockatoo and the south-eastern red-tailed black cockatoo are under threat. Five subspecies are recognised, differing chiefly in beak size. It is more common in the drier parts of the continent. Adult males have a characteristic pair of bright red panels on the tail that gives the species its name.
The red-tailed black cockatoo ( Calyptorhynchus banksii) also known as Banksian- or Banks' black cockatoo, is a large black cockatoo native to Australia.
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