For SciArtSeptember 14: Glowing
Many birds have UV-reflecting parts. In Red Grouse (Willow Ptarmigan), combs above the eye reflect much brighter in the UV spectrum in females and immatures than in adult males. This is likely because carotenoids, pigments which produce red-colored skin and feathers in many birds, seem to mask UV reflectivity, but read more at Mougeot et al. 2007, which inspired this illustration.









