Study Finds That Birds-of-Paradise Are Biofluorescent Research suggests that "hidden" phenomenon provides enhanced signaling for hierarchy and courtship.

Biofluorescence is widespread in birds-of-paradise, a group of tropical birds famous for their spectacular courtship dances.

New research reports, for the first time, the widespread occurrence of biofluorescence in birds-of-paradise. The study, based on specimens collected since the 1800s, finds biofluorescence in 37 of the 45 known birds-of-paradise species and suggests that this special 'glow' is important among males for hierarchy and mating displays.