During my eight, quarter-mile laps of the Wheeler High School running track, I try not to see anything that would encourage me to stop walking. But I do take mental note of things worth this naturalist's attention, and if I'm lucky enough to have an observable stay in place, I'll return to it when my walk is done. In my formal cardiac rehab program three years ago, I was constantly badgered about the critical importance of a slow down, so grabbing my camera and any collecting supplies and slowly trying to document something would fulfill the mandate of my handlers. What I'd seen on my laps were several dandelions in full bloom, and when I drew close to examine them, I noticed a surprise flower fly in the process of providing pollination services. I was rather astounded, since we'd had a killing frost that I assumed nailed all the syrphids. Not so: here was an unexpected Margined Calligrapher, better known to syrphidologists as, I think, Toxmerus marginatus. In his field guide, Jeff Skevington and company calls TM "one of the most abundant of all syrphids" in our area. One of the hardiest, too.