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The black falcon (''Falco subniger'') is a medium-large falcon that is endemic to Australia. It can be found in all mainland states and territories and yet is regarded as Australia's most under-studied falcon.〔Debus, S.J.S. & Olsen, J. (2011). Some aspects of the biology of the Black Falcon ''Falco subniger''. Corella 35: 29-36〕 == Description == The information in this section is based on recent descriptions by several authors (notably, Debus & Davies 2012, Debus & Olsen 2011, Morcombe 2002 and Birds in Backyards n.d.).〔〔Debus, S.J. S & Davies, J. (2012). Birds of prey of Australia: a field guide (2nd ed). CSIRO Publishing, Collingwood, Vic〕〔Morcombe, M. (2002). Field guide to Australian birds. Steve Parish Publishing, Archerfield, Qld〕〔Birds in Backyards (n.d.). Black Falcon. Retrieved 19 October 2013 http://www.birdsinbackyards.net/species/Falco-subniger〕 Size (adult, beak to tail): 45 – 56 cm (average 50 cm), tail makes up about half the length. Note: Females are larger than males - this is a form of sexual dimorphism. Average weight: 833 g (female) 582 g (male). Wing span: 95 –115 cm. Colouration is uniform dark brown to sooty black; juveniles are generally darker than adults; underwing feathers are two-tone (flight feathers slightly paler); adults may have an evident dark stripe below the eye. Occasionally the birds may have a white chin, spots on underwing coverts or bars on undertail coverts. Cere, eye ring and feet are pale grey (or pale blue-grey); eye is dark brown and beak tip is black. Talons are black. Chick is white down. The falcon’s body is streamlined with a relatively long tail and slim build. Wings are long and pointed tapering toward wing tip. 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「Black falcon」の詳細全文を読む スポンサード リンク
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