As perfectly stated in the Kaufman Field Guide to Insects of North America, these incredible flies “are to other insects what falcons are to other birds: swift predators on the wing.” There are seven different robber flies in this genus in North America. For prey, they focus on other robber flies, bees, and wasps …a dangerous way to make a living if you ask us.
Photo by Glenn Marangelo on 7/5/20 in near Condon, MT.