Parents will go a long way to protect their children, and one type of wasp goes as far as offering a home to a parasitic mite that helps fight off intruders at its nest. After breeding, potter wasps (Allodynerus delphinalis) build a nest and lay eggs inside cavities that contain food and are sealed with mud and saliva. But the insect's offspring are threatened by parasitic wasps that try to invade the nest and lay their eggs inside the cavities. This kills the baby potter wasp in the process.