There is no clear answer, and we promise to write another blog on this terrific matchup of insects. However, the tarantula hawk does have a larger size and the ability to fly, so it does seem to have a bit of an edge. That said, bullet ants almost always attack in groups, and if a swarm of ants is able to sting a tarantulas hawk, you can pretty much assume that its goose is cooked.  Moreover, the bullet ant stings are considered even more painful and long lasting than the tarantula hawk, so its certainly an evenly matched contest.