The adult wingspan is 75 to 105 mm. Adult luna moths are large green moths with a long tail on each hind wing and discal eyespots on both the fore and hind wings. The luna moth is univoltine (one generation) from Michigan northward, bivoltine throughout the Ohio Valley, and trivoltine southward (Tuskes et al. 1996). In Louisiana and Florida, adults may be found during every month of the year. Also, reared specimens often differ in coloration from those in nature. View the luna moth caterpillar here!