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Keywords from Image Description:
Acrocephalus naumann. extract medium the largest bird on the left Acrocephalus schoenobaenus up originally described as Calamodus schoenobaenus Acrocephalus paludicola on the right originally described as Calamodus aquaticus Source biologie unihamburg de htm aus NAUMANN NATURGESCHICHTE DER VGEL MITTELEUROPAS Band II Tafel Gera