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Great Reed Warbler  (Acrocephalus arundinaceus, cat. ) (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: http://www.biologie.uni-hamburg.de/b-online/birds/2181_31.htm archive copy at the Wayback Machine

aus: NAUMANN, NATURGESCHICHTE DER VÖGEL MITTELEUROPAS: Band II, Tafel 2 - Gera, 1897 digitale Bearbeitung : Peter v. Sengbusch - b-online@botanik.uni-hamburg.de

This image comes from the book: Naumann, Naturgeschichte der Vögel Mitteleuropas. 3. Aufl. Neubearb. von G. Berg et al. Hrsg. von Carl R. Hennicke. (Naumann, Natural history of the birds of central Europe, 3rd Ed. Revised by G. Berg et al.; Edited by Carl R. Hennicke.) of 1905 or his earlier works. The copyrights for those books have expired and this image is in the public domain. See all volumes at Biodiversity Heritage Library

	This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years or fewer. This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
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