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Keywords from Image Description:
Naumann II. . Natrl Grsse Europischer Kleiber Sitta europaea caesia Wolf Mnnchen Weibchen Beide aus Westdeutschland Sitta europaea Mnnchen aus Ostpreussen Sitta europaea Homeyeri Seebohm Sitta europaea Mnnchen aus Schweden II Illustration biodiversitylibrary org title Hennicke Carl Richard Naumann Johann Andreas