Diptera.info :: Identification queries :: Diptera (adults)
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 flies on oak tree sap
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| elck |
Posted on 30-07-2005 20:55
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Member Location: Rotterdam, Netherlands Posts: 120 Joined: 21.03.05 |
On an oak tree I saw a lot of wasps in a frenzy over the trees' sap. On closer observation I also saw these flies. In extreem dark circumstances so I had to spike the pictures considerably. Any ideas?   
Edited by elck on 30-07-2005 23:39 |
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| Paul Beuk |
Posted on 30-07-2005 23:14
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 Super Administrator Location: Netherlands Posts: 19375 Joined: 11.05.04 |
They are Drosophilidae, belonging to the Drosophila genera complex. I will try to find out which one it is.
Paul - - - - Paul Beuk on https://diptera.info |
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| elck |
Posted on 30-07-2005 23:40
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Member Location: Rotterdam, Netherlands Posts: 120 Joined: 21.03.05 |
thanks, is it known behaviour? |
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| Paul Beuk |
Posted on 31-07-2005 09:32
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Super Administrator Location: Netherlands Posts: 19375 Joined: 11.05.04 |
Numerous species may come to fermenting substances of any kind. Several seem to prefer fermenting tree sap, among others the species of the (former sub-)genus Scaptodrosophila, including the species S. deflexa and S. rufifrons. Moreover, some other (morphologically different) genera can be found near sapruns as well, for example Amiota, Leucophenga and Stegana.
Paul - - - - Paul Beuk on https://diptera.info |
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| elck |
Posted on 31-07-2005 11:28
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Member Location: Rotterdam, Netherlands Posts: 120 Joined: 21.03.05 |
Apart from the wasps vespula vulgaris I also observed Atalanta butterflies vanessa atalanta . It's always a good place to see insects from near by. Thanks for the reply. Edited by elck on 31-07-2005 11:29 |
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