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Western Orphean warbler : ウィキペディア英語版 | Western Orphean warbler
The western Orphean warbler (''Sylvia hortensis'') is a typical warbler of the genus ''Sylvia''. This species occurs in summer around the Mediterranean, through western Europe and extending into northwest Africa. It is migratory, wintering in sub-Saharan Africa. It is a rare vagrant to northern and north-western Europe. ==Taxonomy and systematics== Two subspecies are unequivocally accepted,〔Snow, David W.; Perrins, Christopher M.; Doherty, Paul & Cramp, Stanley (1998). ''The complete birds of the western Palaearctic on CD-ROM''. Oxford University Press. ISBN 0-19-268579-1.〕 but they are now usually considered separate species.〔Helbig, A. J. (2001). Phylogeny and biogeography of the genus ''Sylvia'', in: Shirihai, Hadoram: ''Sylvia warblers'': 24-29. Princeton University Press, Princeton, N.J. ISBN 0-691-08833-0〕〔Jønsson, Knud A. & Fjeldså, Jon (2006). A phylogenetic supertree of oscine passerine birds (Aves: Passeri). ''Zool. Scripta'' 35(2): 149–186. (HTML abstract).〕 The western Orphean warbler is probably most closely allied to the Arabian warbler, as well as the brown warbler and Yemen warblers which are sometimes placed in ''Parisoma''. They together with the lesser whitethroat group seem to form a distinct clade of typical warblers. The species therein do not appear much alike at first glance, but they all have prominent white throats, lack rufous wing-patches, and usually having dark sides to the head.〔〔
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