A week ago I did a post about a very small Robber Fly (Gnat Oger) (Holcocephala fusca). Tonight’s post is about a Robber Fly (Promachus rufipes) that is one of the largest of the Robber Flies, measuring in at 1.25″ to 1.5″. These Robber Flies are ravenous predators. One will find the perfect spot, perching…