Doing what comes naturally

I noticed hoverflies crawling inside some white Campanula, or Bellflowers, which I have in the garden, which like the poppy from a week or so ago appeared one year, though strangely they started out purple (Ah ... a v. loose link to HeartFreek's July challenge?). I dashed indoors for the camera, but standing despite standing around for 5 or 10mins, not a single one re-appeared. Instead, these amorous flies perched briefly on the stalk and I rattled off a few shots before they few off. Sadly, only a couple of shots were near sharp and I felt this was the best, despite the out of focus head on one.