A ventral view of Morpho didius, a Neotropical butterfly belonging to the subfamily Morphinae of familyNymphalidae. With a wingspan reaching 150 mm (5.9 in), it is one of the largest of Morpho species.A ventral view of Morpho didius, a Neotropical butterfly belonging to the subfamily Morphinae of familyNymphalidae. With a wingspan reaching 150 mm (5.9 in), it is one of the largest of Morpho species.