Evolution. Colorful males flaunt their health.
Pennisi
Elizabeth
E
D000818:Animals; D001502:Beak / Q000033:anatomy & histology / Q000737:chemistry*; D001717:Birds / Q000033:anatomy & histology / Q000276:immunology / Q000502:physiology*; D002338:Carotenoids / Q000008:administration & dosage / Q000032:analysis / Q000502:physiology*; D004032:Diet; D005260:Female; D007107:Immune System / Q000502:physiology*; D008297:Male; D010858:Pigmentation; D012726:Sexual Behavior, Animal; D020308:Songbirds / Q000033:anatomy & histology / Q000276:immunology / Q000502:physiology
D002338:Carotenoids