Great Reed Warble (Acrocephalus arundinaceus)

The Great Reed Warbler (Acrocephalus arundinaceus)  is an Eurasiaan songbird in the genus Acrocephalus. It used to be placed in the "Old World warbler" assemblage, but nowadays is recognized to be part of the marsh- and tree-warbler family (Acrocephalidae). This is a large thrush-sized warbler, 16–20 cm in length. The adult has an unstreaked brown upperparts and dull buffish-white chin and underparts. The forehead is flattened, and the bill is strong and pointed. It looks very much like a giant Eurasian Reed Warbler (A. scirpaceus), but with a stronger supercilium.The sexes are identical, as with most warblers, but young birds are richer buff below.The song is very loud and far-carrying. Its main phrase is a chattering and creaking carr-carr-cree-cree-cree-jet-jet, to which the whistles and vocal mimicry typical of marsh-warblers are added.

(Source Wikipedia)