St Mark's Fly Bibio marci Taking a Break

e6filmusere6filmuser e6filmuserPosts: 2,571Registered Users Major grins

I was in deciduous woodland three days ago. In one partially shaded spot there was a large pile of felled tree trunks rotting away. It was quite a clamber as I looked for mushrooms.

On the upper side of one trunk I saw a black insect which looked like a wasp ovipositing in the wood. A closer look showed it to be a male bibionid. I had no idea whether it had only settled momentarily so I grabbed my camera and had no time to sort out flash. Although the fly moved around quite a bit, if very slowly, I managed to get some shots, the IS not coping with all of them. The official size range is 10-15mm.

Olympus EM-1 (aperture priority), Olympus 4/3 x2 TC, Olympus 4/3 50mm f2 macro, 1/20 or 1/10 at f8, ISO 800, hand-held.



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