A while back, I posted about a bee imitator that I thought was a syrphid, or flower fly, but it turned out to be a wool carder. Yesterday I found an actual syrphid on my daisies.
Though it buzzes and hovers like a bee, it does not sting or bite. The bee-like markings also help fool predators. The larvae eat garden pests such as aphids.
This one has a vertical black stripe, which drew my attention, and it has a white face and big fly-eyes. There's a poster of some Syrphidae on Wikipedia that shows some of the many varieties.
My garden sure is pollinator central!