Caligo atreus, the yellow-edged giant owl, is a butterfly of the family Nymphalidae. The species can be found from Mexico to Peru. The wingspan is 140–160 mm. The larvae feed on Musa and Heliconia species and can be a pest for banana cultivation. Adults feed on juices of rotting fruit. Adults are known for their relatively long lifespan compared to other butterflies. Up to 3-4+ months. Adults are slow and often are attacked by birds. Adult males reaming inactive for most of the day until around 6 AM and 6 PM for an hour.