| Flies in May |
| Tephritis neessii |
 |
| Amstelveen; 16 May 2009. |
| Dolichopodidae |
| Nederlands | : | Slankpootvliegen |
| English | : | long-legged flies |
| Deutsch | : | Langbeinfliegen |
 |
| Amstelveen; 16 May 2009. |
| Helina impuncta |
 |
 |
| Amstelveen; 16 May 2009. | |
|
Phaonia serva |
 |
| Amstelveen; 16 May 2009. |
|
Lucilia spec. |
 |
| Amstelveen; 16 May 2009. |
|
Micropeza corrigiolata |
 |
| Amstelveen; 16 May 2009. |
| Eristalinus sepulchralis |
| Authority | : | (Linnaeus, 1758) |
| Nederlands | : | Weidevlekoog |
| Deutsch | : | Schwarze Augenfleck-Schwebfliege |
| Norsk | : | sotsvart droneflue |
| Svenska | : | dyngslamfluga |
 |
| Amstelveen; 16 May 2009. |
| Pales pavida |
 |
| Amstelveen; 16 May 2009. |
| Microchrysa polita |
| Authority | : | (Linnaeus, 1758) |
| Nederlands | : | Groene glimwapenvlieg |
| English | : | black-horned gem |
 |
| Amstelveen; 16 May 2009. |
| Sarcophagidae |
| Nederlands | : | Dambordvliegen |
| English | : | flesh flies |
| Deutsch | : | Fleischfliegen |
 |
| Amstelveen; 16 May 2009. |
| Melanogaster spec. |
 |
| Amstelveen; 17 May 2009. |
| Beris chalybata |
| Authority | : | (Forster, 1771) |
| Synonyms | : | Musca chalybata Forster, 1771 |
| Nederlands | : | Kleine stekelwapenvlieg |
| English | : | murky-legged black legionnaire |
 |
| Amstelveen; 17 May 2009. |
| Trixoscelis spec. |
 |
| Amstelveen; 21 May 2009. |
| Tetanocera elata |
 |
| Amstelveen; 21 May 2009. |
| Phyto melanocephala |
 |
| Amstelveen; 21 May 2009. |
| Pollenia spec. |
| English | : | clusterflies |
 |
| Amstelveen; 22 May 2009. |
| Tachydromia spec. |
 |
| Amstelveen; 22 May 2009. |
| Merodon equestris |
| Authority | : | (Fabricius, 1794) |
| Nederlands | : | Grote narcisvlieg |
| Deutsch | : | Gemeine Narzissenschwebfliege |
| Norsk | : | vanlig narsissflue |
| Svenska | : | bred narcissblomfluga |
 |
| Amstelveen; 22 May 2009. |
| Blepharipa pratensis |
 |
| Amstelveen; 22 May 2009. |
| Melanophora roralis |
 |
| Amstelveen; 23 May 2009. |
| Thricops diaphanus |
 |
| Amsterdamse bos; 23 May 2009. |
| Muscina levida |
 |
| Amstelveen; 22 May 2009. |
| Pipizella spec. |
 |
| Amstelveen; 23 May 2009. |
| Lucilia spec. |
| English | : | True greenbottles |
 |
| Amstelveen; 23 May 2009. |
|
Pamponerus germanicus |
| Authority | : | (Linnaeus, 1758) |
| Nederlands | : | Bruinvleugelroofvlieg |
| English | : | pied-winged robberfly |
| Deutsch | : | Alabasterfliege |
 |
 |
| Amsterdamse Waterleidingduinen; 24 May 2009. | |
|
Neurigona quadrifasciata |
 |
| Amsterdamse Waterleidingduinen; 24 May 2009. |
| Triarthria setipennis |
 |
| Amstelveen; 28 May 2009. |
| Mintho rufiventris |
 |
| Amstelveen; 28 May 2009. |
| Minettia spec. |
 |
| Amstelveen; 28 May 2009. |
| Linnaemya cf. tessellans |
 |
| Amstelveen; 28 May 2009. |
| Musca autumnalis |
 |
| Ronde Hoep polder; 30 May 2009. |
| Sepedon sphegea |
 |
| Ronde Hoep polder; 30 May 2009. |
| Odontomyia tigrina |
| Authority | : | (Fabricius, 1775) |
| Nederlands | : | Zwarte moeraswapenvlieg |
| English | : | black colonel |
 |
 |
| Ronde Hoep polder; 30 May 2009. Left, female; right, male. | |
| Pyrophaena granditarsa |
| Authority | : | (Forster, 1771) |
| Nederlands | : | Klompvoetje |
 |
 |
| Ronde Hoep polder; 30 May 2009. Left, female; right, male. | |
| Solieria pacifica |
 |
| Amstelveen; 30 May 2009. |
| Nemotelus pantherinus |
| Nederlands | : | Zwartwitte snuitwapenvlieg |
 |
| Amstelveen; 30 May 2009. |
| Phyto melanocephala |
 |
 |
| Amstelveen; 30 May 2009. Male. | |
| Paykullia maculata |
 |
| Amstelveen; 6 June 2009. |