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The rose-ringed parakeet (''Psittacula krameri''), also known as the ring-necked parakeet, is a gregarious tropical Afro-Asian parakeet species that has an extremely large range. The rose-ringed parakeet is sexually dimorphic. The adult male sports a red or black neck ring and the hen and immature birds of both sexes either show no neck rings, or display shadow-like pale to dark grey neck rings. Both sexes have a distinctive green colour. Rose-ringed parakeets measure on average in length, including the tail feathers, a large portion of their total length. Their average single-wing length is about . In the wild, this is a noisy species with an unmistakable squawking call. It is herbivorous and not migratory. One of the few parrot species that have successfully adapted to living in disturbed habitats, it has withstood the onslaught of urbanisation and deforestation. As a popular pet species, escaped birds have colonised a number of cities around the world. Since the population appears to be increasing, the species was evaluated as being of least concern by the IUCN in 2012, but its popularity as a pet and unpopularity with farmers have both reduced its numbers in some parts of its native range.〔 The scientific name commemorates the Austrian naturalist Wilhelm Heinrich Kramer. ==Phylogeny and distribution== Four subspecies are recognized, though they differ little: * African subspecies: :African rose-ringed parakeet (''P. k. krameri''): western Africa in Guinea, Senegal, and southern Mauritania, east to western Uganda and southern Sudan, Egypt. Resident among the Nile valley and certainly Giza, it is sometimes seen on the north coast and Sinai. The African parakeet also started to breed in Israel in the 1980s and is considered an invasive species. :Abyssinian rose-ringed parakeet (''P. k. parvirostris''): northwest Somalia, west across northern Ethiopia to Sennar district, Sudan * Asian subspecies: :Indian rose-ringed parakeet (''P. k. manillensis'') originates from the southern Indian subcontinent and has feral and naturalized populations worldwide. In Australia, Great Britain (mainly around London), the United States, and other western countries, it is often referred to as the Indian ringneck parrot. :Boreal rose-ringed parakeet (''P. k. borealis'') is distributed in Bangladesh, Pakistan, northern India and Nepal to central Burma; introduced populations are found worldwide. A phylogenetic analysis using DNA (see ''Psittacula'') showed that the Mauritius parakeet (''Psittacula echo'') is closely related to this species, and probably needs to be placed between the African and Asian subspecies. Consequently, this species is paraphyletic. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rose-ringed parakeet」の詳細全文を読む スポンサード リンク
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