Common earwig wing (Forficula auricularia (m))

Forficula auricularia (m)

The wings of earwigs are a fantastic invention of nature, more than 200 Mio. years ago. They can fold to 1/10 of the full size, are extremely thin, yet very resistant. The folding mechanism is more sophisticated than any modern man-made (telescopic) umrella construction. The whole wing fits neatly below the elytron (see left lower corner), once folded

Here I used perpendicular illumination, so the thickness of the wing corresponds directly to the colors cf.
here, lower diagram
Yellow regions are around 150nm (which is 1/4 of the wavelength of visible (green) light), magenta and blue areas are a bit thicker (180-220nm).

Full earwig can be seen here

Mitutoyo 5x NA 0.14, tube lens: Thorlabs 165mm
Illumination: Oblique

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Make:	SONY
Model:	ILCE-1
Exposure:	0.05 sec (1/20)
ISO Speed:	100
Lens:	----