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Réunion harrier : ウィキペディア英語版
Réunion harrier

The Réunion harrier or Réunion marsh harrier (''Circus maillardi'') is a bird of prey belonging to the marsh harrier group of harriers. It is now found only on the Indian Ocean island of Réunion, where it is known locally as the ''papangue'' or ''pied jaune'', although fossil material from Mauritius has been referred to this species. The Malagasy harrier (''C. macrosceles'') of Madagascar and the Comoro Islands was previously treated as a subspecies of this bird but is increasingly regarded as a separate species. The Réunion harrier appears to be declining in numbers and it is classed as an endangered species.
==Description==

It is about 42–55 cm long; the female is around 3–15% larger than the male.〔Ferguson-Lees, James & David A. Christie (2001) ''Raptors of the World'', Christopher Helm, London.〕 The male has a blackish head and back with white streaks. The underparts, underwings and rump are white and the tail is grey. The wings are grey and black with a white leading edge. Females and immatures are dark brown with a white rump and barred tail.〔BirdLife International (2014) (Species factsheet: ''Circus maillardi'' ). Downloaded from http://www.birdlife.org on 26 January 2014.〕
The birds are mostly silent except during the breeding season when they give a chattering threat call, a wailing courtship call and chuckling food-associated calls.〔
The Malagasy harrier is larger and paler with longer wings and legs.

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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