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Square-tailed drongo-cuckoo : ウィキペディア英語版
Square-tailed drongo-cuckoo

The square-tailed drongo-cuckoo (''Surniculus lugubris'') is a species of cuckoo that resembles a black drongo. It is found in Sri Lanka and Southeast Asia and is a summer visitor to the Himalayas from Kashmir to eastern Bangladesh. The calls are series of piercing sharp whistles rising in pitch but shrill and choppily delivered.〔 It can be easily distinguished by its straight beak and the white barred vent and outer undertail, and the tail only notched with slightly flared tips. In flight a white wing-stripe is visible from below. It is a brood parasite on small babblers. It is not known how or whether the drongo-like appearance benefits this species but it is suspected that it aids in brood-parasitism just as hawk-cuckoos appear like hawks.
Some recent work suggested that the species was conspecific with the fork-tailed drongo-cuckoo and together known as the Asian drongo-cuckoo, but should be split based on call and morphological differences:.〔Rasmussen, P. C. & Anderton, J. C. 2005 Birds of South Asia. The Ripley Guide. Smithsonian and Lynx Edicions〕〔Fu-Min, Lei & Robert B. Payne (2002) Territorial songs of the drongo cuckoo complex (''Surniculus lugubris'' & ''S. velutinus''). The Raffles Bulletin of Zoology 50(1):205-213 (PDF )〕 That treatment is taken here.
==References==



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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