A spider wasp quickly subdues the spider it preys on. The wasp's sting affects the spider's central nervous system, paralyzing but not killing the spider. Often the spider is too large to carry in flight and the wasp must drag it to the nest. Some species bite off the spider's legs to make it easier to drag and may drink blood that leaks from the wounds. The spider wasp places a single spider in each nest, which is often constructed after catching the prey. Some species specialize on trap-door spiders and tarantulas, using the spider's own burrow for a nest. The wasp lays an egg on the paralyzed spider, which is eventually eaten by the wasp's larva