Moth Wing Microstructure — Saturnia pavonia Scale Study

Description

The wing scale of a moth is a single modified epidermal cell — a flattened, expanded structure approximately 100-200 micrometres in length, tiled in overlapping rows on the wing surface like roof shingles. This photograph, made at 12:1 reproduction of the hindwing of a male Emperor moth (Saturnia pavonia), resolves individual scales in the field of view, revealing their characteristic shape (ovate with a basal insertion socket), the parallel longitudinal ribs on the upper scale surface, and the colour pigment distribution within each scale. The eye-spot colouration of the Emperor moth wing is produced by a precise spatial arrangement of differently pigmented scale populations — a biological ‘printing’ process of extraordinary resolution visible at this magnification.