MOTH WING SCALES (Argema mittrei) © Kevin MacKenzie, University of Aberdeen   Scanning electron micrograph of the scales on the  wing of a Madagascan moon moth, (Argema mittrei). This  endangered moth is from the order Lepidoptera and is also known as the  Comet moth, because of its characteristic long tail. The tail span is 15  cm and wing span 20 cm, making it one of the world’s largest silk  moths. Scales are found on the wings of butterflies and moths in the  Lepidoptera order,