. Der Ornithologische Beobachter. Birds; Birds. Tafel Fig. 1. Fig. 2. Fig. 3 Beilage zu „Der Ornithologische Beobachter" 1914 15, Heft 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 Ala, Schweizerische Gesellschaft felkunde und Vogelschutz. [Bern?, Ala, Schweizerische Gesellschaft felkunde und Vogelschutz]

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbirds, bookyear1902