Species of bird
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The Philippine coucal (Centropus viridis) is a species of cuckoo in the family Cuculidae.
It is endemic to the Philippines. It is an insectivore.
Description and taxonomy.
EBird describes the bird as "A large, long-tailed bird of open or disturbed areas from the lowlands to middle elevations in the mountains. Entirely black except for rufous wings. A black-winged race from Mindoro occurs, as does an uncommon white form on Luzon. Forages for insects and other animal prey, on or close to the ground. Similar to Black-hooded Coucal, but has a black rather than brown belly and is found in more open habitats. Much larger than Lesser Coucal. Voice includes a slightly descending series of repeated “wok!” notes and a short, explosive “jek-wok-wok!”
Subspecies.
Four subspecies are recognized:
Medium, sexes similar; races differ in color "carpenteri" and "mindorensis" are all black while "viridis" and "majer" are black with chestnut wings, and in size "carpenteri and majer" are larger than "viridis and mindorensis. in viridis" 
Habitat and conservation status.
Its natural habitats are tall grassland, secondary forest and thickets up to 2,000 meters above sea level 
The IUCN Red List has assessed this bird as least-concern species as it has a wide range is able to tolerate a wide range of habitat where it actually benefits from human altered habitat. 
References.
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