Keith recently contributed to a discussion about a paper in Science about parrot feather colors.  The Gordon group did some work in this area.  We used resonance Raman spectroscopy to establish the frequency dispersion of the dyes, called psittacofulvins (R.Soc.Open Sci. 5  (2018) 172010 and  Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 262 (2021) […]