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Greater rhea, Rhea americana 1, and black swan, Cygnus atratus 2. Handcoloured copperplate engraving from Bertuch's "Bilderbuch fur Kinder" (Picture Book for Children), Weimar, 1798. Friedrich Johann Bertuch (1747-1822) was a German
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Believed to be mythical, black swans in fact turned out to be quite real. | Black bird, Black swan, Patterns in nature
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