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Talking bird
Talking birds are birds that can mimic the spoken language of humans. There is debate within the scientific community over whether some talking parrots also have some cognitive understanding of the language. Birds have varying degrees of talking ability: some, like the corvids, are able to mimic only a few words and phrases, while some budgerigars have been observed to have a vocabulary of almost 2,000 words. The hill myna, a common pet, is well known for its talking ability and its relative, the European starling, is also adept at mimicry.〔("Talking Starlings" ). Starling Talk. Retrieved May 26, 2013.〕 Wild cockatoos in Australia have been reported to have learned human speech by cultural transmission from ex-captive birds that have integrated into the flock.〔Price, Hannah (September 15, 2011). ("Birds of a feather talk together" ). ''Australian Geographic''.〕
The earliest reference to a talking bird comes from Ctesias in the 5th century BC. The bird which he called Bittacus, may have been a plum-headed parakeet.
==Process==
The young of some birds learn to communicate vocally by social learning, imitating their parents, as well as the dominant birds of their flock. Lacking vocal cords, birds are thought to make tones and sounds using throat muscles and membranes – the syrinx in particular. There are likely to be limitations on the sounds that birds can mimic due to differences in anatomical structures such as their lacking lips. However, it has been suggested that mimicry amongst birds is almost ubiquitous and it is likely that eventually, all species will be shown to be able to have some ability to mimic extra-specific sounds (but not necessarily human speech).〔
Songbirds and parrots are the two groups of birds able to learn and mimic human speech.〔〔(【引用サイトリンク】title=Superb lyrebird )〕 Pet birds can be taught to speak by their owners by mimicking their voice. If then introduced to wild birds, the wild birds may also mimic the new sounds. This phenomenon has been observed in public parks in Sydney, Australia, where wild parrots utter phrases such as "Hello darling!" and "What's happening?"〔
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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