Any one of numerous species of large, handsome, tropical American butterflies, of the genus Morpho. They are noted for the very brilliant metallic luster and bright colors (often blue) of the upper surface of the wings. The lower surface is usually brown or gray, with eyelike spots.
- Any of various large, brightly colored butterflies of the genus Morpho, found in tropical parts of Central and South America and including especially M. menelaus and M. rhetenor. These butterflies are noted for the brilliant iridescent blue color of their wings.