Thread subject: Diptera.info :: flies on oak tree sap
Posted by elck on 30-07-2005 20:55
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.
Edited by elck on 30-07-2005 23:39
Posted by Paul Beuk on 30-07-2005 23:14
They are Drosophilidae, belonging to the Drosophila
genera complex. I will try to find out which one it is.
Posted by elck on 30-07-2005 23:40
thanks, is it known behaviour?
Posted by Paul Beuk on 31-07-2005 09:32
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
Posted by elck on 31-07-2005 11:28
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