Pterin pigment granules are responsible for both broadband light scattering and wavelength selective absorption in the wing scales of pierid butterflies.

@article{Morehouse2007PterinPG,
  title={Pterin pigment granules are responsible for both broadband light scattering and wavelength selective absorption in the wing scales of pierid butterflies.},
  author={Nathan I. Morehouse and Peter Vukusic and Ron Rutowski},
  journal={Proceedings. Biological sciences},
  year={2007},
  volume={274 1608},
  pages={359-66}
}
A small but growing literature indicates that many animal colours are produced by combinations of structural and pigmentary mechanisms. We investigated one such complex colour phenotype: the highly chromatic wing colours of pierid butterflies including oranges, yellows and patterns which appear white to the human eye, but strongly absorb the ultraviolet (UV) wavelengths visible to butterflies. Pierids produce these bright colours using wing scales that contain collections of minute granules… CONTINUE READING
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