. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Abb. 4. Der gleiche Vogel in der Balzpenode 1956; Schwanzstellung noch senkrecht, Hals geringfügig aufgebläht. (Foto Gewalt). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Zoologisches Forschungsinstitut und Museum Alexander Koenig. Bonn : Das Forschungsinstitut

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Keywords: ., bookcentury1900, bookcoll, booksubjectbiology, booksubjectzoology