title: Halcyon days.
authors.affiliation: University of California, Davis, Sacramento, USA. irschwab@ucdavis.edu
authors.forename: I R
authors.initials: IR
authors.lastname: Schwab
authors.forename: N S
authors.initials: NS
authors.lastname: Hart
mesh_terms: D000818:Animals; D005075:Biological Evolution; D001717:Birds / Q000502:physiology*; D003118:Color Perception / Q000502:physiology*; D009229:Mythology; D012168:Retinal Pigments / Q000502:physiology
chemical_list: D012168:Retinal Pigments