They can use the designs of butterfly wing structures to design totally new water-resistent products, use butterfly wings and colours to fight any counterfeited currencies. When I collected I had a small microscope and I studied these wings, even tried to color them by myself. I had all kinds of traps, sugar liquid, UV light and even some moth female traps to collect moths mostly. I always wanted to catch the Death-Head hawkmoth, but not here this north. Maybe when the global warming evolves it is possible, I also believe that this warming changes colours of the butterfly and moth wings, polutions makes them darker, but without polution I believe these wings become lighter and brighter as it is in the Amazon region. Here are some of my collection again.
