A morpho butterfly is one of over 29 accepted species and 147 accepted subspecies of butterflies in the genus Morpho. They are neotropical butterflies found mostly in South America, Mexico, and Central America. Morphos range in wingspan from the 7.5-cm (3-in) M. rhodopteron to the imposing 20-cm (8-in) sunset morpho, M. hecuba. The name morpho, meaning changed or modified, is also an epithet of Aphrodite and Venus.