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Barred hawk
The barred hawk (''Morphnarchus princeps'') is a species of bird of prey in the Accipitridae family. It has also been known as the black-chested hawk.
It is found in Colombia, Costa Rica, Ecuador, Panama, and Peru. Its natural habitats are subtropical or tropical moist lowland forests and subtropical or tropical moist montane forests. 10,000 to 100,000 barred hawks are thought to exist throughout Central and South America. Barred hawks mainly live in the dense forests of the lowland and mountainous areas.
==Taxonomy and Evolution==
Phillip L. Schlater first classified the barred hawk in 1865. Barred hawks are in the family Accipitridae that contains all the hawks, eagles, and old world vultures.〔vulturesRaposo do Amaral, Fabio S., Matthew J. Miller, Luis F. Silveira, Eldredge Bermingham, and Anita Wajntal. "Polyphyly of the hawk genera Leucopternis and Buteogallus (Aves, Accipitridae): multiple habitat shifts during the Neotropical buteonine diversification." BMC Evolutionary Biology 6 (2006).〕 Recent research-using mtDNA to analyze the phylogeny of this genus has been done. What researchers found was that the black and white plumage of genus ''Leucopternis'' has evolved at least twice, and the widespread occurrence of this plumage pattern may result from plumage convergence in forested.〔habitatsRaposo do Amaral, Fabio S., Matthew J. Miller, Luis F. Silveira, Eldredge Bermingham, and Anita Wajntal. "Polyphyly of the hawk genera Leucopternis and Buteogallus (Aves, Accipitridae): multiple habitat shifts during the Neotropical buteonine diversification." BMC Evolutionary Biology 6 (2006).〕 In classical taxonomy, the black and white plumage pattern was overemphasized in the grouping of Leucopternis and plumage patterns alone may not be reliable taxonomic markers in this family.〔Raposo do Amaral, Fabio S., Matthew J. Miller, Luis F. Silveira, Eldredge Bermingham, and Anita Wajntal. "Polyphyly of the hawk genera Leucopternis and Buteogallus (Aves, Accipitridae): multiple habitat shifts during the Neotropical buteonine diversification." BMC Evolutionary Biology 6 (2006).〕 Studies suggest placing it in its own genus.
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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