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If Formosa really is not found in Denmark (I would wondering me about that), then my closest guess would be Thephritis bardanae. But looking at pictures and compare with yours I found about the same variability as comparing yours with Formosa.
Yes the wing pattern is important but to me T. formosa doesn't look like a match and yes I would also guess what's in UK should be also in DK but sometimes not. One of my professors is a specialist in flies but unfortunately I'm done with my university so can't get any help from there but in DK there are 10 species of that genus which 4 look like good match but will need to work a lot on the wing pattern and body shape so I will need some time :). Here are all the species but in danish: http://www.fugleognatur.dk/soeg_art_resu...
Actually I have no IDeas of flies, but I find it a nice match. Concening the range, do you refer on the wiki link? I think what's found in Gemany and UK, is also found in Denmark. Little bit stupid, but works most of the time ;-)... Please, try to get some more infos, maybe you know a fly expert who can help. Wing patterns are important I guess and the match is almost perfect, but, if you do not feel comfortable, you can take the genus name.
http://www.naturespot.org.uk/species/tep...
http://micropics.org.uk/Tephritidae/Teph...
http://www.bugsandweeds.co.uk/flies%20p2...
http://aramel.free.fr/INSECTES15-6.shtml...
Some other different looking ones:
http://micropics.org.uk/Tephritidae/Teph...
http://micropics.org.uk/Tephritidae/Teph...
Oh and we don't have this species in Denmark and looks pretty different but there are a few options that could be but still I'm thinking maybe it would be better to leave it only with the genus name? What do you say boss? :)
Thanks again bayucca, I couldn't get better photos because it was standing on a branch as high as myself that's why I don't have the dorsal photo and when tried to lower the branch it just flew away.
Tephritidae, Tephritis formosa, a Fruit Fly. Please, verify, I cannot see the whole fly and markins on the wings.