Drepanornis albertisi - Bird of Paradise

Drepanornis albertisi
Rarely witnessed and never before photographed, a buff-tailed sicklebill shows off its pectoral collar to a female watching from above. The sicklebill's long curved beak helps it probe trees and leaf litter for insects that make up the bulk of its diet.

Source:
http://ngm.nationalgeographic.com/2007/07/birds-of-paradise/laman-photography