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The Lord Derby's parakeet (''Psittacula derbiana''), also known as Derbyan parakeet, is a monotypic〔(【引用サイトリンク】Zoological Nomenclature Resource: Psittaciformes (Version 9.022) )〕 parrot species, which is confined to small pocket of moist evergreen forest in the hills of the Indian state of Arunachal Pradesh and the adjoining parts of Tibet. The species suffers from poaching for the illegal wildlife trade and fetches a high price in the black market. It is perhaps the rarest of all species of Psittacula in mainland Asia. As of the 2011 IUCN Red List of Threatened Species its status was updated from Least Concern to Near Threatened. The adult male and female are easily distinguished because they have different beak colours and slightly different plumage. The name of this bird commemorates Edward Stanley, 13th Earl of Derby. Lord Derby's parakeets feed on fruits, berries, seeds, and leaf buds, occasionally foraging in gardens and fields. ==Description== Lord Derby's parakeets average 20 inches (50 centimeters) in length and are sexually dimorphic. They have a mostly green plumage over their dorsal surface (i.e. from behind), black lores and lower cheeks, a bluish-purple crown and pale yellow eyes. The throat, breast, abdomen and under-wing coverts are greyish blue to lavender. The thighs and vent area are yellowish green with blue edging on some of the feathers. The tail feathers are shades of green, some edged with blue. Male birds have a red upper mandible with a yellow tip, while the lower mandible is black. The females have an all-black beak. Immature Lord Derby's parakeets are duller in colour than the adults. Juvenile birds have green crowns, orange-red upper and lower mandible (beak), and their irises are dark and do not lighten until they reach maturity between two and three years of age. 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「Lord Derby's parakeet」の詳細全文を読む スポンサード リンク
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