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Cookie (cockatoo)
Cookie (hatched June 30, 1933 in Australia) is a male Major Mitchell's cockatoo residing at Brookfield Zoo, near Chicago, Illinois, United States. He is believed to be the oldest member of his species alive in captivity, at the age of 82 in June 2015,〔https://www.youtube.com/watch?v=hQ_H09XyeL4〕〔(【引用サイトリンク】url=http://www.wgntv.com/news/wgntv-cookie-the-cockatoo-turns-79-20120630,0,4260958.story )〕 having significantly exceeded the average lifespan for his kind.〔 He is one of the longest-lived birds on record〔(【引用サイトリンク】url=http://genomics.senescence.info/species/entry.php?species=Cacatua_leadbeateri )〕 and has been recognised by the Guinness Book of Records as the oldest living parrot in the world.〔(【引用サイトリンク】url=http://www.guinnessworldrecords.com/world-records/oldest-parrot-living )〕 The next-oldest Major Mitchell's cockatoo to be found in a zoological setting is a 31-year-old female bird located at Paradise Wildlife Sanctuary, England.〔 Information published by the World Parrot Trust states longevity for Cookie's species in captivity at 40–60 years.〔(【引用サイトリンク】title=Major Mitchell's Cockatoo (Cacatua leadbeateri) )〕
Cookie is Brookfield Zoo's oldest resident and the only surviving member of the animal collection from the time of the zoo's opening in 1934, having arrived from Taronga Zoo of Sydney, New South Wales, Australia, in the same year and judged to be one year old at the time.
In 2007, Cookie was diagnosed with and placed on medication and nutritional supplements for osteoarthritis and osteoporosis – medical conditions which occur commonly in aging animals and humans alike,〔 although it is believed that the latter may also have been brought on as a result of being fed a seed-only diet for the first 40 years of his life, in the years before the dietary requirements of his species were fully understood.
Cookie was "retired" from exhibition at the zoo in 2009 (following a few months of weekend-only appearances) in order to preserve his health, after it was noticed by staff that his appetite, demeanour and stress levels improved markedly when not on public display. He now lives permanently in the keepers' office of the zoo's Perching Bird House, although it has been stated that he may still make occasional appearances for special events such as his birthday celebration, which is held each June. As of 2013, he is still considered to be in good health for his age.
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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