The yellow-tailed black cockatoo (Zanda funerea) is a large cockatoo native to the south-east of Australia measuring in length. It has a short crest on the top of its head. Its plumage is mostly brownish black and it has prominent yellow cheek patches and a yellow tail band. The body feathers are edged with yellow giving a scalloped appearance. The adult male has a black beak and pinkish-red eye-rings, and the female has a bone-coloured beak and grey eye-rings. In flight, yellow-tailed black cockatoos flap deeply and slowly, with a peculiar heavy fluid motion. Their loud, wailing calls carry for long distances. The yellow-tailed black cockatoo is found in temperate forests and forested areas across south and central eastern Queensland to southeastern South Australia, including a very small population persisting in the Eyre Peninsula. Two subspecies are recognised, although Tasmanian and southern mainland populations of the southern subspecies xanthanotus may be distinct enough from each other to bring the total to three. Birds of subspecies funereus (Queensland to eastern Victoria) have longer wings and tails and darker plumage overall, while those of xanthanotus (western Victoria, South Australia and Tasmania) have more prominent scalloping. The subspecies whiteae is found south of Victoria to the East of South Australia and is smaller in size.
The yellow-tailed black cockatoo's diet primarily includes seeds of native and introduced plants while also feeding on wood-boring grubs. They nest in large hollows high in old growth native trees (~ greater than 200 years old), generally Eucalyptus regnans. Although they remain common throughout much of their range, fragmentation of habitat and loss of large trees suitable for nesting has caused population decline in Victoria and South Australia. Furthermore, the species may lose most of its mainland range due to climate change. In some places yellow-tailed black cockatoos appear to have partially adapted to recent human alteration of landscape and they can often be seen in parts of urban Canberra, Sydney, Adelaide and Melbourne. The species is not commonly seen in aviculture, especially outside Australia. Like most parrots, it is protected by CITES, an international agreement that makes trade, export, and import of listed wild-caught species illegal.
Taxonomy and naming
The yellow-tailed black cockatoo was first described in 1794 by the English naturalist George Shaw as Psittacus funereus, its specific name funereus relating to its dark and sombre plumage, as if dressed for a funeral.Higgins, p. 66. The French zoologist Anselme Gaëtan Desmarest reclassified it in the new genus Calyptorhynchus in 1826.
The ornithologist John Gould knew the bird as the funereal cockatoo. "Yellow-tailed black cockatoo" has been designated the official name by the International Ornithologists' Union (IOC). Other common names used include yellow-eared black cockatoo, and wylah. Wy-la was an aboriginal term from the Hunter Region of New South Wales, while the Dharawal name from the Illawarra region is Ngaoaraa. Scientist and cockatoo authority Matt Cameron has proposed dropping the "black" and shortening the name to "yellow-tailed cockatoo", explaining that shorter names are more widely accepted.Cameron, p. 7.
Among the black cockatoos, the two Western Australian white-tailed species (Carnaby's and Baudin's black cockatoos), together with the yellow-tailed black cockatoo (Z. funerea) of eastern Australia, form the genus Zanda. The two red-tailed species, red-tailed black cockatoo (C. banksii) and glossy black cockatoo (C. lathami), form the genus Calyptorhynchus. The three species of Zanda were formerly included in Calyptorhynchus (and still are by some authorities), but are now widely placed in a genus of their own due to a deep genetic divergence between the two groups. The two genera differ in tail color, head pattern, juvenile food begging calls and the degree of sexual dimorphism. Males and females of Calyptorhynchus sensu stricto differ markedly in appearance, whereas those of Zanda have similar plumage.
The three species of the genus Zanda have been variously considered as two, then as a single species for many years. In a 1979 paper, Australian ornithologist Denis Saunders highlighted the similarity between the short-billed and the southern race xanthanota of the yellow-tailed and treated them as a single species, with the long-billed as a distinct species. He proposed that Western Australia had been colonised on two separate occasions, once by a common ancestor of all three forms (which became the long-billed black cockatoo), and later by what has become the short-billed black cockatoo. However, an analysis of protein allozymes published in 1984 revealed the two Western Australian forms to be more closely related to each other than to the yellow-tailed, and the consensus since then has been to treat them as three separate species.
Within the species, two subspecies are recognised: Z. f. funerea, the nominate form, is known as the eastern yellow-tailed black cockatoo. It is found from the Berserker Range in Central Queensland, south through New South Wales, and into eastern Victoria. It is distinguished by its overall larger size, longer tail and wings, and larger bill and claws. Z. f. xanthanota, known as the southern yellow-tailed black cockatoo, is found in western Victoria, southeastern South Australia, the islands of Bass Strait, and Tasmania. Gould described it in 1838 and later changed his spelling to "xanthonotus". However, the first name was recognised as taking precedence under ICZN naming rules and its spelling preserved. Saunders reported in 1979 that male birds from Tasmania had wider bills than their mainland relatives, and that Tasmanian female birds were larger than males. However, this observation has yet to be replicated and most authorities only recognise two subspecies. If a third subspecies is recognised, the southern mainland subspecies would be named whiteae, having been named so by Gregory Mathews in 1912, and the name xanthanotus, originally applied to a Tasmanian specimen, would be restricted to the Tasmanian population.Higgins, p. 76.
Description
The yellow-tailed black cockatoo is in length and 750–900 grams in weight. It has a short mobile crest on the top of its head, and the plumage is mostly brownish-black with paler feather-margins in the neck, nape, and wings, and pale yellow bands in the tail feathers. The tails of birds of subspecies funereus measure around , with an average tail length longer than xanthanotus. Male funereus birds weigh on average around and females weigh about . Birds of the xanthanotus race on the mainland average heavier than the Tasmanian birds; the males on the mainland weigh on average around 630 g and females , while those on Tasmania average 583 and respectively. Both mainland and Tasmanian birds of the xanthanotus race average about in tail length. The plumage is a more solid brown-black in the eastern subspecies, while the southern race has more pronounced yellow scalloping on the underparts.
The male yellow-tailed black cockatoo has a black bill, a dull yellow patch behind each eye, and pinkish or reddish eye-rings. The female has grey eye-rings, a horn-coloured bill, and brighter and more clearly defined yellow cheek-patches. Immature birds have duller plumage overall, a horn-coloured bill, and grey eye-rings;Forshaw (2006), plate 1.Lendon, p. 57. The upper beak of the immature male darkens to black by two years of age, commencing at the base of the bill and spreading over ten weeks. The lower beak blackens later by four years of age. The elongated bill has a pointed maxilla (upper beak), suited to digging out grubs from tree branches and trunks.Cameron, p. 65. Records of the timing of the eye ring changing from grey to pink in male birds are sparse, but have been recorded anywhere from one to four years of age.Higgins, p. 75. Australian farmer and amateur ornithologist John Courtney proposed that the similarity between juvenile and female eye rings prevented adult males becoming aggressive to younger birds. He also observed the eye rings to flush brighter in aggressive males. Moulting appears to take place in stages over the course of a year, and is poorly understood.
The yellow-tailed black cockatoo is distinguished from other dark-plumaged birds by its yellow tail and ear markings, and its contact call. Parts of its range overlap with the ranges of two cockatoo species that have red tail banding, the red-tailed cockatoo and the glossy black cockatoo. Crow species may appear similar when seen flying at a distance; however, crows have shorter tails, a quicker wing beat, and different calls.
An all-yellow bird lacking black pigment was recorded in Wauchope, New South Wales, in December 1996, and it remained part of the local group of cockatoos for four years. Birds with part-yellow plumage have been recorded from different areas in Victoria.Forshaw (2002), p. 70. Another all-yellow bird was discovered in 2024 and is housed at the Bonorong Wildlife Sanctuary.
Distribution and habitat
The yellow-tailed black cockatoo is found up to above sea level over southeastern Australia including the island of Tasmania and the islands of the Bass Strait (King, Flinders, Cape Barren islands), and also on Kangaroo Island.Forshaw (2006), p. 18. On Tasmania and the islands of the Bass Strait it is the only native black-coloured cockatoo. On the mainland, it is found from the vicinity of Gin Gin and Gympie in south and central eastern Queensland, south through New South Wales, where it occurs along the Great Dividing Range and to the coast, and into and across most of Victoria bar the northern and northwestern corner, to the Coorong and Mount Lofty Ranges in southeastern South Australia. A tiny population numbering 30 to 40 birds inhabits the Eyre Peninsula. There they are found in sugar gum (Eucalyptus cladocalyx) woodland in the lower peninsula and migrate to the mallee areas in the northern peninsula after breeding.Cameron, p. 19. There is evidence that birds on the New South Wales south coast move from elevated areas to lower lying areas towards the coast in winter. They are generally common or locally very common in a wide range of habits, although they tend to be locally rare at the limits of their range. Their breeding range is restricted to areas with large old trees.
The birds prefers native temperate forests, while also being ubiquitous in pine plantations, and occasionally in urban areas, as long as there is a plentiful food supply.Cameron, p. 76. They have also spread to parts of suburban Sydney, particularly on or near golf courses, pine plantations and parks,Higgins, p. 68. such as Centennial Park in the eastern suburbs. It is unclear whether this is adaptive or because of loss of habitat elsewhere. In urban Melbourne, they have been recorded at Yarra Bend Park. The "Black Saturday bushfires" of 2009 appear to have caused sufficient loss of their natural habitat for them to have been sighted in other parts of the urban areas of Melbourne as well. Furthermore, climate change is predicted to cause a major loss of habitat on Australian mainland. They are also found along the Mornington peninsula.
Ecology and behaviour