Frame 15 x 20 cm (6 x 8 inches).

Morpho didius is farmed extensively in Central America for the insect trade. Insect farming is a source of revenue for some third world countries. This metallic blue species is the most commonly sold butterfly worldwide Males are metallic blue and female have subdued colors. The blue is not created by pigment but the structural surface of the wing scales has ridges, refracting light, something like a rainbow. It is technically impossible to fade the wing color, as it is generated by sunlight.