Robber Fly

Robber flies are highly variable in size and body shape, ranging from 0.5 to 5.0 cm (0.2 to 2.0 in) in length. Most species are slender-bodied, with hunched backs and tapering abdomens; but some are stout-bodied and hairy, with rounded abdomens, resembling bees. They have large eyes that face toward the sides, and the top of the head is typically concave between the eyes.