I've been meaning to get one of these awesome looking wasps. They're really cool. The ones around here have dark blue metallic bodies and bright orange wings.
They also have one of the most painful stings out there. The 2nd most painful right behind the bullet ant if I remember right.
Anyways, they use that sting to paralyze their prey and then lay a larva on it which then uses the tarantula as food.
Funny how we see tarantulas as these big bad ass spiders but compared to these real bad asses, they are just living food.