Wie hängen sie zusammen

The upper wings of the blue morpho butterflies shimmer like precious stones in the biodiversity wall. Despite the supposedly luminous colour, the wings of the morpho butterflies do not contain any colour pigments. The colour impression is created solely by optical tricks: tiny scales stacked on top of each other like roof tiles on the wings form a rough surface that refracts and bends the incident light and reflects only the short-wave blue and violet light.