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Hi. I'm searching for any suggestions what kind of Diptera I found in my garden, 5-6 mm big. yellow/bronze rear (I'm chemist so sorry for lack of profesionalism). Yellow arrow sign on head. Red eyes. Please look attachement and link below.
http://fotogalerie.pl/fotka/3035691273415177s2,mwa66,Mucha-.htm
picture was made by myself in Poland, North center part of country, Torun city area. Four next pictures represent the same "fly". I'm more macro photography "young" enthusiast than Dipterologist but each my insect should be identified. Thanks in advance for any suggestions. Best Regarsd. Marek