Most ants live outdoors, however, some may nest in or near structures and become a nuisance. Ants undergo complete metamorphosis. The four life stages are egg, larva, pupa, and adult. The egg, larva, and pupa stages are known collectively as the brood. The brood remains in safe inside the ant colony. There are several type of adult ants. There can be one or more queens which are responsible for laying eggs. All other adults are sterile female workers most of the year. Workers are always wingless and will be the ones see crawling around.