Tarantula hawks are parasitoid (meaning they lay eggs on their victims) wasps that prey on tarantulas. They have a paralytic venom and they will sting, drag the victim back to their nest, and lay an egg on it. The larva will then eat the spider.What in the world are these?
They are usually fairly docile but they will sting if you mess with them (or if you're doing landscaping work and accidentally disturb them). Their sting is incredibly painful.