 The iridescent structural colours of butterfly wings are produced by photonic nanostructures, which are passed down through generations. These colours are then used for sexual signalling and can be accurately replicated from generation to generation. Scanning electron microscope, SEM and transmission electron microscope, TEM investigations have revealed how these colours are generated and how their characteristics can be manipulated. Additionally, the colour shift between natural and artificially created colours has been calculated, and it has been determined that this shift occurs due to the swelling of the chitinous layers during standard TEM sample preparation, as well as the tilting of the cover scales. This article was offered by Gabapista, Christian Cortes, Jolt Ballant, and others.