Spotting

Gonia vacua or Gonia sp. might be another candidate, although I have the impression of the dark stripe being to slim and too "regular" compared to the one from Jopy. But this is only what my eyes see...

Ok, Thank you guys! I will check all your suggestions :)

Check Gonia vacua, I have a very similar spotting:
http://www.projectnoah.org/spottings/244...

Definitely a Tachinidae. My closest guess would be Echinomyia fera or Tachina magnicornis, which a tendency to Echinomyia fera due to the missing "whitish" area at the end of the body. But I do not know how important this part would be.
http://www.fotocommunity.de/search?q=Ech...
http://www.fotocommunity.de/search?q=Ech...
http://www.chili-balkon.de/viecher/echin...
https://en.wikipedia.org/wiki/Tachina_fe...
http://www.biolib.cz/en/image/id62424/
A link with both:
http://www.veluwe-insecten.nl/vliegen/ta...

I found a similar looking fly, but it's hard to identify them (at least I have some problems) :D There is a chance that they belong to Tachinidae family (at least there are some flies in this this family who have something orange on the abdomen) ;)