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crested pigeon
The crested pigeon (''Ocyphaps lophotes'', commonly mistakenly called a ''topknot pigeon'') is a bird found widely throughout mainland Australia except for the far northern tropical areas. It is the only member of the genus ''Ocyphaps''. There are only two Australian pigeon species that possess an erect crest, being the crested pigeon and the spinifex pigeon. The crested pigeon is the larger of the two species. The crested pigeon is sometimes incorrectly referred to as a topknot pigeon, however the topknot pigeon, or ''Lopholaimus antarcticus'' is a different species altogether, and has a red-brown crest that does not stand erect.
==Description==
The length of the crested pigeon varies from 30 to 34 centimetres (12 to 13.6 inches). Colouration is grey with tinges of brown and green. It has a feathered but slender, black spike on top of the head. They run with the crest erect. The periorbital skin is bright orange. Wings have black stripes and are bronzed, while the primary feathers have colourful areas of brown, purple, blue and green. Immature birds have duller colours with no bronzing on the wings.
If startled, the crested pigeon will take to the air with a distinctive whistling 'call', the source of the noise can be attributed to the way the air rushes over a modified primary feather found on the wings.〔http://birdlife.org.au/bird-profile/Crested-Pigeon〕
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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