Diptera.info

Posted by Sundew on 05-04-2010 22:59

Hi friends,
To break my long silence I show you some flies from the Baltic shore I met on Rugia Island two weeks ago. Many of them were on the feathers of a dead sea bird and had much fun together. I suppose it is Fucellia. Can be said more?
I am afraid the number of my photos of unidentified flies is inversely proportional to the time I can spend on them. So any help is greatly appreciated!
Regards, Sundew

Posted by Roger Thomason on 05-04-2010 23:07

Looks like F.fucorum just like the ones I've been finding up here.
http://www.dipter...ost_126818
Nice series of pics :)

Roger

Posted by Sundew on 05-04-2010 23:23

So we agree in the genus, but F. fucorum has black tibiae and mine have brownish ones. F. maritima or F. tergina seem to be better candidates...
Thanks, Roger.

Posted by Roger Thomason on 05-04-2010 23:38

Hi Sundew
I only zoomed in on the first set of pics, the legs on those look very dark to me, the other sets of pics they look brownish....maybe there are not all the same species ???? Or maybe my eyes are in need of a re-test...sans San Miguel. :|

Roger

Posted by Nikita Vikhrev on 05-04-2010 23:46

I'd say you have reasons both.
Photo N2 t2 with av legs black - fucorum
Photo NN 7,8 t2 without av, tibiae yellow in basal part - maritima or tergina

Posted by Sundew on 06-04-2010 00:34

Well, I checked all my pics - and there is a lot of them - for the colour of the legs, but it is difficult to decide, as the light was suboptimal. However, some flies have a darker frons and thorax and possibly dark tibiae, and the couples always seem to be of identical colour. So there are two species indeed! (I wished I knew the variability of the species, it is hard to estimate, being a non-expert.) I add two more photos of a lighter and a darker specimen.
Thanks for discussion. Regards, Sundew

Edited by Sundew on 06-04-2010 00:35

Posted by Roger Thomason on 06-04-2010 00:56

#10

Hi Sundew
Bottom one looks the same as mine fucorum and the top one as Nikita says either maritima or tergina, Sorry I don't know how to tell those two apart. Apologies for not looking at the second and third set of photo's in larger size...I assumed wrongly that they were all the same species.

Regards Roger

Edited by Roger Thomason on 06-04-2010 00:59