Posted by Carnifex on 01-02-2018 19:35
#8
Dear Keith,
I moved the potted plant into another room, and now the flies appear there. So they might in fact come from the soil.
I found this article (in German) about phenological appearances of Dolichopodidae in Switzerland, and there have been some cases of
Hercostomus rusticus in Dezember and February.
http://www.zora.u...ntHelv.pdf
Cheers!