In some birds, males and females are distinguished solely by color. In others, males possess additional ornamentation not seen in females. This is especially true in birds-of-paradise such as the Twelve-wired Bird-of-Paradise, which has several long tail wires, which it sweeps across a female’s face during courtship displays.
This video accompanies Chapter 4, Feathers and Plumages, Handbook of Bird Biology, 3rd Edition from the Cornell Lab of Ornithology and Wiley Publishing.
Recorded by Timothy G. Laman, Macaulay Library