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Semiplumbeous hawk : ウィキペディア英語版 | Semiplumbeous hawk
The semiplumbeous hawk (''Leucopternis semiplumbeus'') is a species of bird of prey in the Accipitridae family. It is found in Colombia, Costa Rica, Ecuador, Honduras, and Panama. Its natural habitat is subtropical or tropical moist lowland forests. ==Morphology== The semiplumbeous hawk is a small bird, averaging about 12-13 inches in length〔Henderson, Carrol L. "Birds of Costa Rica." University of Texas Press, 2002 and 2010. pg 71〕 (approximately the size of a kestrel or merlin). The semiplumbeous hawk is easily identifiable due to its striking orange cere and black face mask.〔 Rarely seen in flight, these hawks typically perch silently on a high branch, waiting for prey.〔 The semiplumbeous hawk often follows swarms of army ants in order to capture antbirds,〔 which, along with other small songbirds, make up a large portion of its diet. The overall population of semiplumbeous hawks is small - estimated at 1,000 to 10,000 mature birds - and declining.〔BirdLife International 2009. (Semiplumbeous Hawk Leucopternis semiplumbeus ) at Birdlife.org.〕
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