. Der Ornithologische Beobachter. Birds; Birds. Beilage zu „Der Ornithologische Beobachter" 1915 16, Heft 1. Tafel Nest mit Jungen des Zwergreihers Ardetta minuta L. Bielersee, 20. Juni 1915. Naturaufnahme von Fr. Weber-Brög, 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