Sylvia nisoria (up) and Sylvia hortensis (bottom; originally described as Sylvia orphaea)
Source: http://www.biologie.uni-hamburg.de/b-online/birds/2181_36.htm
aus: NAUMANN, NATURGESCHICHTE DER VÖGEL MITTELEUROPAS: Band II, Tafel 8 - Gera, 1897 digitale Bearbeitung : Peter v. Sengbusch - b-online@botanik.uni-hamburg.de
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This image comes from the book Naumann, Naturgeschichte der Vögel Mitteleuropas (Natural history of the birds of central Europe) of 1905. The copyrights for that book have expired and this image is in the public domain. See here |
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