| Kleptoparasitic interactions among animals |
| Diptera: Drosophilidae |
| Cacoxenus indagator | ||
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| Amstelveen, the Netherlands; 17 April 2007. | ||
| kleptoparasite of Osmia bicornis | ||
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| Amstelveen, the Netherlands; 17 & 18 April 2007. | ||