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Sedge Warbler Acrocephalus schoenobaenus L 12-13cm. Well-marked wetland warbler with distinctive song. Sexes are similar. Adult has dark-streaked sandy brown upperparts and pale underparts, flushed orange-buff on breast and flanks. Head has dark-streaked crown, striking pale supercilium and dark eyestripe. Juvenile is similar but breast is faintly streaked. Voice Utters a sharp chek alarm call. Song comprises rasping and grating phrases interspersed with trills and whistles. Status Widespread summer visitor to rank marshy vegetation, scrub patches on fringes of reedbeds and overgrown ditches.