Editing Cockatoo (section)

===Pests===
Several species of cockatoo can be serious agricultural [[pest (organism)|pests]].<ref>{{Cite journal|title= Australian research on bird pests: impact, management and future directions|journal=[[Emu (journal)|Emu]]|year=2002|first=Mary|last=B|author2=Sinclair R|volume=102|issue=1|pages=29–45|doi=10.1071/MU01028|bibcode=2002EmuAO.102...29B |s2cid=83464835}}</ref> They are sometimes [[pest control|controlled]] by shooting, [[poison]]ing or capture followed by [[gas chamber|gassing]]. Non-lethal damage mitigation methods used include scaring, habitat manipulation and the provision of decoy food dumps or sacrifice crops to distract them from the main crop. They can be a nuisance in urban areas due to destruction of property. They maintain their bills in the wild by chewing on wood, but in suburbia, they may chew outdoor furniture, door and window frames;<ref name = "Temby"/> soft decorative timbers such as [[western redcedar]] are readily demolished.<ref name=Cam155>{{Harvnb|Cameron|2007|p=155}}.</ref> Birds may also target external wiring and fixtures such as solar water heaters,<ref name = "Temby"/> television antennae and satellite dishes.<ref name=Cam155/> A business in central Melbourne suffered as sulphur-crested cockatoos repeatedly stripped the silicone sealant from the plate glass windows.<ref name=Cam156>{{Harvnb|Cameron|2007|p=156}}.</ref> Galahs and red-tailed black cockatoos have stripped electrical cabling in rural areas and tarpaulin is targeted elsewhere.<ref name=Cam156/> Outside Australia, the Tanimbar corella is a pest on [[Yamdena|Yamdena Island]] where it raids maize crops.<ref>{{Harvnb|Cameron|2007|p=160}}.</ref>
[[File:Sulphur-crested Cockatoos damaging a shopping centre facade 4.jpg|left|thumb|Sulphur-crested cockatoos damaging the Sturt Mall shopping centre facade, made of polystyrene|alt=a number of white cockatoos are biting parts of the building wall, leaving chunks of polystyrene missing.]]
In 1995 the [[Government of Victoria|Government]] of the [[States and territories of Australia|state]] of [[Victoria (Australia)|Victoria]] published a report on problems caused by long-billed corellas, sulphur-crested cockatoos and galahs, three species which, along with the little corella, have large and growing populations, having benefited from anthropogenic changes to the landscape. Subsequent to the findings and publication of the report, these three species were declared unprotected by a [[King-in-Council|Governor in Council]] Order under certain conditions and are allowed to be killed where serious damage is being caused by them to trees, vineyards, orchards, recreational reserves and commercial crops.<ref>{{cite web|url=http://www.dpi.vic.gov.au/DPI/nreninf.nsf/childdocs/-C3270146B772814F4A2568B30006FFEE-7A5820241AEA1564CA256BC800078098-7B785784C934E20E4A256DEA00292002-00FD9A5C09190C59CA256BCF000B4D61?open|title=Victorian cockatoos. Victorian Department of Primary Industries Information Note|last=Temby|first=I|year=2003|website=Department of Primary Industries website|publisher=The State of Victoria|access-date=10 December 2009| archive-url = https://web.archive.org/web/20070917115645/http://www.dpi.vic.gov.au/DPI/nreninf.nsf/childdocs/-C3270146B772814F4A2568B30006FFEE-7A5820241AEA1564CA256BC800078098-7B785784C934E20E4A256DEA00292002-00FD9A5C09190C59CA256BCF000B4D61?open| archive-date = 17 September 2007}}</ref> Damage covered by the report included not only that to cereal crops, fruit and nut orchards and some kinds of vegetable crops but also to houses and communications equipment.<ref name=enrc>{{Cite book|author=Environment and Natural Resources Committee (Parliament of Victoria)|year=1995|title=Problems in Victoria caused by Long-billed Corellas, Sulphur-crested Cockatoos and Galahs|publisher=Victorian Government Printer}}</ref> The little corella is a declared pest of agriculture in Western Australia, where it is an aviculturally introduced species. The birds damage [[sorghum]], maize, [[sunflower]], [[chickpea]]s and other crops. They also [[defoliate]] [[Ornamental plant|amenity trees]] in parks and gardens, dig for edible roots and [[corm]]s on [[playing field|sports grounds]] and [[race track]]s, as well as chew wiring and household fittings.<ref>{{cite web|url=http://www.agric.wa.gov.au/content/pw/vp/bird/20_little_corella.pdf|archive-url=https://web.archive.org/web/20080901133738/http://www.agric.wa.gov.au/content/pw/vp/bird/20_little_corella.pdf|archive-date=2008-09-01|title=Fauna Note No.20: Little Corella|date=24 July 2007|publisher=Western Australian Department of Environment and Conservation|access-date=10 December 2009}}</ref> In South Australia, where flocks can number several thousand birds and the species is listed as unprotected, they are accused of defoliating [[Eucalyptus camaldulensis|red gums]] and other native or ornamental trees used for roosting, damaging [[tarpaulin]]s on grain bunkers, wiring and flashing on buildings, taking grain from newly seeded [[Field (agriculture)|paddocks]] and creating a [[noise pollution|noise nuisance]].<ref>{{cite web|url=http://www.environment.sa.gov.au/biodiversity/pdfs/lc_resource_doc.pdf|archive-url=https://web.archive.org/web/20090325220711/http://www.environment.sa.gov.au/biodiversity/pdfs/lc_resource_doc.pdf|archive-date=25 March 2009|title=Little Corella (''Cacatua sanguinea''): Resource document|date=March 2007|publisher=South Australian Department for Environment and Heritage|access-date=10 December 2009}}</ref>

Several rare species and subspecies, too, have been recorded as causing problems. The [[Carnaby's black cockatoo]], a [[Threatened fauna of Australia|threatened]] [[Western Australian]] [[endemism|endemic]], has been considered a pest in pine [[plantations in the American South|plantation]]s where the birds chew off the leading shoots of growing pine trees, resulting in bent trunks and reduced timber value.<ref name=Saunders2005>{{Cite conference|first=D |last=Saunders |title=Conserving Carnaby's Black-Cockatoo: historical background on changing status |book-title=Conserving Carnaby's black-cockatoo&nbsp;– future directions: proceedings from a conservation symposium, Perth, Western Australia, 2 July 2003 |pages=9–18 |publisher=Birds Australia WA Inc |year=2005 |location=Perth, Western Australia |url=http://www.birdswa.com.au/projects/carnaby/assets/Conserving%20CBC%20Symposium%20Proceedings%20-%202003.pdf |archive-url=https://web.archive.org/web/20091029231634/http://www.birdswa.com.au/projects/carnaby/assets/Conserving%20CBC%20Symposium%20Proceedings%20-%202003.pdf |archive-date=29 October 2009 |isbn=0-9751429-0-9 |access-date=11 December 2009 |url-status=dead |df=dmy }}</ref> They are also known to damage nut and fruit crops,<ref>{{cite web|url=http://www.environment.gov.au/cgi-bin/sprat/public/publicspecies.pl?taxon_id=59523|title=''Calyptorhynchus latirostris''|year=2009|website=Species Profile and Threats Database|publisher=Department of the Environment, Water, Heritage and the Arts, Canberra|access-date=10 December 2009|archive-date=17 May 2018|archive-url=https://web.archive.org/web/20180517060240/http://environment.gov.au/cgi-bin/sprat/public/publicspecies.pl?taxon_id=59523|url-status=live}}</ref> and have learnt to exploit [[canola]] crops.<ref>{{Harvnb|Cameron|2007|p=22}}</ref> The Baudin's black cockatoo, also endemic to the south-west of Western Australia, can be a pest in apple and pear [[orchard]]s where it destroys the fruit to extract the seeds.<ref name=Saunders2005/> [[Muir's corella]], the nominate subspecies of the western corella, is also a declared pest of agriculture in Western Australia, as well as being nationally [[vulnerable species|vulnerable]] and listed under state legislation as being "rare or likely to become extinct".<ref name=dec4>{{cite web|url=https://www.dpaw.wa.gov.au/images/documents/plants-animals/animals/living-with-wildlife/2008108_muirs_corellas_a5_bookletweb.pdf|date=2008|publisher=Department of Environment and Conservation, Western Australia|title=Muir's corella: conserving a threatened species|access-date=6 February 2016|url-status=dead|archive-url=https://web.archive.org/web/20160330183843/https://www.dpaw.wa.gov.au/images/documents/plants-animals/animals/living-with-wildlife/2008108_muirs_corellas_a5_bookletweb.pdf|archive-date=30 March 2016|df=dmy-all}}</ref>