Like Katy Perry’s halftime star ride, some bugs just beg to be seen. Some flash and glimmer to attract mates while others show off to tell you to back off. Whether they’re blending in with a little bling or wowing with disco-ball bodies, insects use amazing engineering feats to play tricks with light. Here’s how they do it:

Piled sheets of exoskeleton create stunning colors in beetles and harlequin bugs, as well as the mirror-like golds and silvers found in chrysalises.

Some insects take reflecting to the next level with added features. Morpho butterflies’ tree-shaped structures work like LEDs. They trap light and force it back out in a straight line. Morphos are even more impressive than LEDs, reflecting 80 percent of the light that enters their wings.


Another type of reflector uses dishes that reflect light with a colorful effect. Different dish thicknesses, widths, and depths result in different color and shine outcomes. These structures not only produce regal brown in the bronzed tiger beetle but also help the gaudy Madagascar sunset moth strut her stuff.

Weevils and some butterflies use complex 3D, crystal-like structures in their exoskeletons to reflect light, like opals. Light bounces off the indentions in all directions.


Cooler still: Some insects use their powers of reflection to hide from selected audiences. The green hairstreak butterfly’s wings reflect polarized light to its mates while camouflaging its wings against new spring leaves.



Some Morpho butterflies flash shiny blue or green signals to mates from the sidelines while appearing dull and brown to hungry birds from above. Other insects never want to be seen and shine their way into the background. Bronzed tiger beetles blend into their sandy habitat, chrysalises reflect their surroundings to appear invisible, and jewel scarab beetles look like water droplets twinkling in the rain forest.Pearl Morpho with shine lines

Written by Nancy Miorelli and illustrated by Maya U Schueller-Elmes.

Nancy Miorelli is a recent graduate from the University of Georgia with her Master’s degree in Entomology. She has a borderline unhealthy obsession with insects, and if you have any bug questions, you can shoot them over to her blog, Ask an Entomologist (

Maya U Schueller-Elmes is an artist and illustrator from London. She works as an Art and Music Technician at a secondary school, and as a Tutor for the South Island Workshop—a charity that runs art sessions for young people in South London. She has 2 cats that she loves to draw, and is fascinated by little things and huge concepts—like insects and the universe. You can see her current projects on Instagram and Twitter by following @mayauart, or check out her tumblr ( Website:

Check our facts!

Campos-Fernández C, Azofiefa DE, Hernández-Jiménez, Ruiz-Ruiz A, Vargas WE. 2011. Visible light reflection spectra from cuticle layered materials. Optical Materials Express 1(1): 85-100 (

Fabricant SA, Kemp DJ, Krajiček J, Bosákova Z, Herbertstein ME. 2013. Mechanisms of color production in a highly variable shield-back sticknkbug, Tectocoris diopthalmus (Heteroptera: Scutelleridae) and why it matters. PloS One e64082 ( 

Kang, SH, Tai TY, Fang TH. 2010. Replication of butterfly wing microstructures using molding lithography. Current Applied Physics 10:625-630. (

Kolle M, Salgard-Cunha PM, Scherer MRJ, Huang F, Vukusic P, Mahajan S, Baumberg JJ, Steiner U. 2010. Mimicking the colourful wing scale structure of the Papilio blumei Nature Nanotechnology 5:511-515. ( 

Michielsen K, Raedt HD, Stavenga DG. 2010. Reflectivity of the gyroid biophotonic crystals in the ventral wing scales of the green hairstreak butterfly, Callophrys rubi. Journal of the Royal Society Interface 7: 765-771. (

Mille C, Tyrode EC, Corkery RW. 3D titania photonic crystals replicated from gyroid structures in butterfly wing scales: approaching full band gaps at visible wavelengths. RSC Advances 2013(3): 3109-3117. (!divAbstract).

Parker A. 2009. Natural photonics for industrial inspiration. The Royal Society Philosophical Transactions A DOI: 10.1098/rsta.2009.0016

Prum RO, Quinn T, Torres RH. 2006. Anatomically diverse butterfly scales all produce structural colors by coherent scattering. Journal of Experimental Biology 209: 748-765. (

Seago AE, Brady P, Vigneron JP, Schultz TD. 2009. Gold bugs and beyond: A review of iridescence and structural color mechanisms in beetles (Coleoptera). Journal of the Royal Society Interface 6: S165-S184. (

Shawkey MD, Morehouse NI, Vukusic P. 2009. A protean palette: color materials and mixing in birds and butterflies. The Royal Society Interface DOI: 10.1098/rsif.2008.0459.focus. (

Steinbrecht RA, Mohren W, Pulker HK, Schneider D. 1985. Cuticular interference reflectors in the golden pupae of Danaine butterflies. The Royal Society Proceedings B DOI: 10.1098/rspb.1985.0100. (

Sun J, Bhushan B, Tong J. 2013. Structural coloration in Nature. RSC Advances 2013(3): 14862. (!divAbstract).

Yoshioka S and Kinoshita S. 2007. Polarization-sensitive color mixing in the wing of the Madagascan Sunset Moth. Opt Express 15(5): 2691-2701. (

Yoshioka S, Nakano T, Nozue Y, Kinoshita S. 2008. Coloration using higher order optical interference in the wing pattern of the Madagascan sunset moth. The Royal Society Proceedings B DOI: 10.1098/rsif.2007.1268. (

Vukusic P. “Advanced photonic systems on the wing-scales of L” Functional Surfaces in Biology: Little Structures with Big Effects. Gorb S. Springer, 2009. 237-257. (