swans taking off from danube delta biosphere reserve tulcea county romania |
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| navigate by keyword : autumn biodiversity biosphere bird birds black blue county danube delta europe fauna flight heritage lake mila more morning reflection reserve romania sea silhouette swan swans taking tourism travel tulcea unesco water white wings world |
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| The Danube Delta Biosphere Reserve, UNESCO World Heritage Site, Romania, has the third largest biodiversity in the world over 5,500 flora and fauna species |
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