Survey the insects orbiting a globe of milkweed blossoms or the delicate blooms of a chokeberry, and you might spy an apparent chimera. It looks a bit like a bee, perhaps a tad like a wasp, and it ...

Last summer, I watched bee-looking creatures flying in zigzag formation, each with a separate flight plan. Are those bumblebees? Wasps? Nope, they were hoverflies, also called syrphid flies, drone ...