Iridescent colors in insects are created through structural coloration, not pigments. This occurs when microscopic structures on the insect’s exoskeleton or wings interact with light waves. The process involves:
- Tiny scales that reflect and refract light
- Multiple layers that create interference patterns
- Nanostructures that scatter specific wavelengths of light
Common examples include morpho butterflies, whose brilliant blue wings result from complex light interference patterns, and jewel beetles, whose metallic appearance comes from multiple reflecting layers in their exoskeleton. The color appears to shift as viewing angles change, creating a stunning visual effect that can serve both in camouflage and mating displays.