Hyperechia (A robber fly: Asilidae) sucking a wasp dry. "Fly eats wasp" at the entrance gate

Not only does the adult robber fly mimic a carpenter bee in its shape and coloration, but the larvae also parasitize the bee grubs. This one was seen on the railings at the school entrance where it caught and sucked dry a wasp. It has to be immensely powerful and skilled to accomplish this with an insect that is so potent that a single sting is a deterrent for most humans.