Great Cocky Count

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A pair of red-tailed black cockatoos Calyptorhynchus banksii (pair)-8-2cp.jpg
A pair of red-tailed black cockatoos
Carnaby's black cockatoos Calyptorhynchus latirostris Carnaby gnangarra.jpg
Carnaby's black cockatoos
Female Baudin's black cockatoo Calyptorhynchus baudinii (female) -Margaret River-8.jpg
Female Baudin's black cockatoo

The Great Cocky Count is an annual census designed to provide accurate data about the number and distribution of black cockatoos. It is the largest single survey of black cockatoos in Western Australia. [1]

The count is a citizen science survey and is conducted at sunset one night in autumn, usually in early April. [2] It was first held in 2010 and has been conducted each year since apart from 2020 (cancelled due to Covid-19). [3]

Over 700 registered volunteers participated each year at hundreds of locations between Geraldton and Esperance, Western Australia. [3]

The 2019 count had over 700 volunteers surveying over 400 sites, with the endangered Carnaby's black cockatoo being the main focus of the count but the vulnerable Baudin's black cockatoo and forest red-tailed black cockatoo also being counted. [4] [5]

In 2016 a total of 426 roost sites were surveyed by approximately 700 volunteers. The results included:

It was estimated that 27% of the black cockatoos that inhabit the south west of Western Australia were counted in a single night. [6]

The long-term results from the surveys, which have been conducted since 2010, have found that the Carnaby's black cockatoo population of the Perth-Peel coastal plain declined at a rate of roughly 4 per cent each year. There has been a reduction in flock size and fewer occupied roost sites around Perth, mostly as a result of increased urban sprawl and land clearing. 70% of the population are found in the Gnangara pine plantation, which is scheduled to be cleared by 2025. [7] The reduction in numbers is mostly a result of clearing breeding grounds and reducing their range. Currently the birds are thought to be using all available habitat, which is barely enough to support the population. [8]

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<span class="mw-page-title-main">Cockatoo</span> Any bird in the family Cacatuidae

A cockatoo is any of the 21 species of parrots belonging to the family Cacatuidae, the only family in the superfamily Cacatuoidea. Along with the Psittacoidea and the Strigopoidea, they make up the order Psittaciformes. The family has a mainly Australasian distribution, ranging from the Philippines and the eastern Indonesian islands of Wallacea to New Guinea, the Solomon Islands and Australia.

<span class="mw-page-title-main">Yellow-tailed black cockatoo</span> Species of bird native to the south-east of Australia

The yellow-tailed black cockatoo is a large cockatoo native to the south-east of Australia measuring 55–65 cm (22–26 in) 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 have longer wings and tails and darker plumage overall, while those of xanthanotus have more prominent scalloping. The subspecies whiteae is found south of Victoria to the East of South Australia and is smaller in size.

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Carnaby's black cockatoo, also known as the short-billed black cockatoo, is a large black cockatoo endemic to southwest Australia. It was described in 1948 by naturalist Ivan Carnaby. Measuring 53–58 cm (21–23 in) in length, it has a short crest on the top of its head. Its plumage is mostly greyish black, and it has prominent white cheek patches and a white tail band. The body feathers are edged with white giving a scalloped appearance. Adult males have a dark grey beak and pink eye-rings. Adult females have a bone-coloured beak, grey eye-rings and ear patches that are paler than those of the males.

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Baudin's black cockatoo, also known as Baudin's cockatoo or the long-billed black cockatoo, is a species of genus Zanda found in southwest Australia. The epithet commemorates the French explorer Nicolas Baudin. It has a short crest on the top of its head, and the plumage is mostly greyish black. It has prominent white cheek patches and a white tail band. The body feathers are edged with white giving a scalloped appearance. Adult males have a dark grey beak and pink eye-rings. Adult females have a bone coloured beak, grey eye-rings and ear patches that are paler than those of the males.

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Ivan Clarence Carnaby was an Australian farmer, naturalist and ornithologist. He was born in Subiaco, Western Australia. He published many papers on Southwest Australian birdlife in Emu, The Western Australian Naturalist and Western Australian Bird Notes. He also made several botanical collecting journeys with Henry Steedman. He is commemorated in one of the common names of Carnaby's cockatoo, also known as the short-billed black cockatoo, which he described in 1948. Carnaby first suggested the existence of more than one kind of white-tailed black-cockatoo in the 1930s, something later confirmed by research.

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References

  1. "Great Cocky Count". Birdlife Australia. 2016. Retrieved 3 September 2016.
  2. "2016 great cocky count". Southcoast Natural Resource Management. 2016. Retrieved 3 September 2016.
  3. 1 2 "Record number of volunteers sign up for Great Cocky Count". Australian Broadcasting Corporation. 2 April 2014. Retrieved 15 September 2016.
  4. Rhiannon Bristow-Stagg (28 April 2016). "Great Cocky Count takes the Avon Valley". Science Network Western Australia. Retrieved 4 September 2016.
  5. "Join the Great Cocky Count 2016". Weekend Notes. On Topic Media Pty. Ltd. 2016. Retrieved 15 September 2016.
  6. "Great cocky count update". Northern Agricultural Catchments Council. 2016. Retrieved 15 September 2016.
  7. "Perth's urban sprawl driving out Carnaby's black cockatoos". Perthnow. News Corporation. 30 October 2015. Retrieved 15 September 2016.
  8. "Cocky count: how Perth's 'green' growth plan could wipe out WA's best-loved bird". Edith Cowan University. 6 April 2016. Retrieved 15 September 2016.