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Keywords from Image Description:
Naumann . Colymbus griseigena Bodd Rothalsiger Lappentaucher altes Mnnchen im Sommerkleide altes Weibchen im Sommerkleide Jugendkleid Dunenkleid XII Illustration biodiversitylibrary org title Hennicke Carl Richard Naumann Johann Andreas Naumann Johann Andreas Naumann Johann Friedrich Biodiversity Heritage Library Naumann