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Aquarius najas
| English: | River Skater |
| German: | |
| Danish: | Stor skøjteløber |
| Date: | 19/06/2014 |
| Location: | Austria, Wien, Kalksburg |
| Copyright: | Per Hoffmann Olsen |
| Camera: | Canon EOS 50D |
| Lens: | Sigma 150mm APO Macro |
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INSECTS.AT - by Per Hoffmann Olsen