Text by Tony Irwin: "Gymnocheta is one of those greenbottles that changes as it gets older, becoming bronze- or copper-coloured. The green coloration is produced by the differential refraction of light from the many-layered cuticle. As the fly ages, particlularly if it spends much time in the sun, the cuticle changes in structure and the wavelength of light that is refracted changes."

Last update: 14.03.10 00:26
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