Diptera.info :: Identification queries :: Diptera (adults)
 small fly near a river from Hungary (Geomyza sp.)
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| jaurinum |
Posted on 30-07-2008 15:55
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 Member Location: Posts: 94 Joined: 08.08.07 |
Locality: NW-Hungary Habitat: river-side vegetation with Urtica dioica, Echinocystis lobata, Cuscuta australis etc. Size: ~8-10mm The fly done unbroken circles with its wings. Which family/genus? Thanks in advance Greetings, David jaurinum attached the following image:  [189.5Kb] Edited by jaurinum on 31-07-2008 15:03 |
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| Paul Beuk |
Posted on 30-07-2008 17:26
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 Super Administrator Location: Netherlands Posts: 19403 Joined: 11.05.04 |
Opomyzidae, Geomyza.
Paul - - - - Paul Beuk on https://diptera.info |
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| Jan Willem |
Posted on 31-07-2008 08:12
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 Member Location: Waalwijk, The Netherlands Posts: 2169 Joined: 24.07.04 |
Hi David, Indeed, like Paul already told you, a Geomyza species. It is a member of the so-called "combinata group". To identify the species of this species group one should normally study the genitalia. Of this species group only Geomyza balachowskyi and G. martineki are known from Hungary but I think that at least G. hackmani also occurs in Hungary. If I had to guess, I would call your specimen G. martineki but that is no positive identification!! So it could be interesting to study specimens like this in more detail. Did you collect the specimen? If so, I would be interested in studying this specimen (and others if you have more material). Jan Willem van Zuijlen |
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| jaurinum |
Posted on 31-07-2008 15:01
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Member Location: Posts: 94 Joined: 08.08.07 |
Thank you very much Paul and Jan. Hi Jan, Thank you for the informations about this group. Unfortunately I haven?t got other pics only this one, even I did not collect it (and other specimens too). But I will go back this place in two weeks or so, try to take a better shot about the species. Otherwise, it was very interesting for me, as the fly moved its wings pass around. I tried to understand the reason of this attitude, but failed to get out. |
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| Jan Willem |
Posted on 01-08-2008 06:19
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Member Location: Waalwijk, The Netherlands Posts: 2169 Joined: 24.07.04 |
The behaviour sounds like courtship display! Did you see other specimens beside the one in your picture?
Jan Willem van Zuijlen |
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