Argus Pheasant Feathers
Photograph by Tim Laman, National Geographic
Found in Southeast Asia, the male great argus pheasant (Argusianus argus) displays these dots on its feathers during courtship. Its plumage radiates around its head, like a peacock's. Beyond attracting a mate, feathers are used for insulation, flight, and, in some cases, to help a bird hunt and evade predators.