The tiny scales covering both the butterflies’ wings and body are modified hairs providing various fundamental functions including insulation and thermoregulation and aiding gliding flight and colouration. Most scales are lamellar, while other forms may be hair-like or specialized as androconia exuding sexual pheromone.
The lumen or surface of the scales has a complex structure. It induces colour either due to the pigmentary colours contained within or due to optical phenomena based on its three-dimensional structure.
The various scales display a large diversity of vivid or indistinct patterns helping the butterfly to protect itself by camouflage and mimicry, as well as helping it to attract mates.