Thread subject: Diptera.info :: Diptera on the beach in Poland, Gdansk

Posted by Robert Zoralski on 26-05-2007 09:06
#1
There were thousands of them on the beach between Gdansk and Sopot (Poland) 13.05.2007. All wet with the sea water. It look like they could be thrown from the sea. Could you help with identification and tell what did they do on the beach this time?

Posted by Robert Zoralski on 26-05-2007 09:07
#2
one more picture

Posted by Robert Zoralski on 26-05-2007 09:09
#3
there were some diptera of this genus too.
but less than the genus showed above.

Posted by Robert Zoralski on 26-05-2007 09:10
#4
dietailted picture

Posted by Kahis on 26-05-2007 10:46
#5
Both are Bibio (Diptera: Bibionidae). Bibionids have rather pronounced sexual dimorphism. The first one is a female and the 2nd one a male. Probably not of the same species though.

Posted by Zeegers on 27-05-2007 15:27
#6
Kahis is quite right ! The wing venation is different.
The male (last) one is either Bibio marci or leucopterus,
the female is something in the johannis - varipes complex.



Theo Zeegers