![]() ![]() A yellow-crested cockatoo (left) and a sulphur-crested cockatoo in a Hong Kong parkĪccording to the International Ornithological Congress, 5 subspecies are recognized: The yellow-crested cockatoo in now one of 11 species placed in the genus Cacatua that was introduced in 1817 by Louis Jean Pierre Vieillot. The type locality is the island of Sulawesi, Indonesia. He placed it with the parrots in the genus Psittacus and coined the binomial name Psittacus sulphureus. When the German naturalist Johann Friedrich Gmelin revised and expanded Carl Linnaeus's Systema Naturae in 1788 he included the yellow-crested cockatoo based on the accounts by earlier naturalists. Then in 1764 George Edwards included the "Lesser white cockatoo with a yellow crest" in his Gleanings of natural history from a pet bird kept at a home in Essex, and in 1779 French polymath Comte de Buffon included the bird in his Histoire Naturelle des Oiseaux. In 1760 the French zoologist Mathurin Jacques Brisson included "Le Kakatoes à hupe jaune" in his Onithologie based on a live bird that he had seen in Paris. In 1738 English naturalist Eleazar Albin included a description and illustration of the "Cockatoo or White crested parrot" in his A Natural History of Birds based on a bird displayed at "The Tiger" tavern on Tower Hill in London. In the 18th century yellow-crested cockatoos were imported into Europe as pets and these birds were described by various naturalists. The yellow-crested cockatoo's diet consists mainly of seeds, buds, fruits, nuts, and herbaceous plants. The citron-crested cockatoo, which used to be considered a subspecies of the yellow-crested cockatoo, is similar, but its crest is clearly orange. Also, the yellow-crested cockatoo's crest is a brighter color, closer to orange. It is easily confused with the larger and more common sulphur-crested cockatoo, which has a more easterly distribution and can be distinguished by the lack of pale yellow coloring on its cheeks (although some sulphur-cresteds develop yellowish patches). The yellow-crested cockatoo is found in wooded and cultivated areas of East Timor and Indonesia's islands of Sulawesi and the Lesser Sundas. The yellow-crested cockatoo ( Cacatua sulphurea) also known as the lesser sulphur-crested cockatoo, is a medium-sized (about 34-cm-long) cockatoo with white plumage, bluish-white bare orbital skin, grey feet, a black bill, and a retractile yellow or orange crest. It then walked a few steps away and proceeded to drop the gumnut without eating it.Native (blue) and introduced (red) ranges of C. “A juvenile from the second group made a beeline to the female in the first group and attempted to steal the gumnut she was eating. All of a sudden another family group flew in, calling to announce their arrival,” Erika says. “I was watching a family group of cockatoos feeding in a marri, happily chomping away on the large gumnuts. Erika’s favourite is her ‘Nut Theft’ story. Over her studies, Erika has seen some of their complex social behaviours play out. “Growing up near Canberra we would have yellow-tails visit our pine trees a few times a year and I’d run outside as soon as I heard them coming,” she says.Įrika now lives in Perth where much of her studies have focused on the forest red-tailed black cockatoo species ( Calyptorhynchus banksii naso ) in south-western WA, many of which have taken up residency in metropolitan areas. Black cockatoo expert Erika Roper from the University of Western Australia has been working with these birds for four years, but has had a lifetime affinity with them. ![]()
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