Shane P. White / Brown Sicklebill (Epimachus meyeri), Kumul Lodge, Papua New Guinea

Tim Laman / Black Sicklebill Bird of Paradise (Epimachus fastuosus) male feeding on fruits of Shefflera tree. New Guinea

Tim Laman / Female Brown Sicklebill (Epimachus meyeri) bird of paradise in the vicinity of Mt. Hagen, Enga Province, Papua New Guinea.

Shane P. White / Brown Sicklebill (Epimachus meyeri) feeding on fruit, Kumul Lodge, Papua New Guinea

Chien Lee / Black Sicklebill (Epimachus fastuosus) courting, Arfak Mountains, New Guinea, Indonesia

Murray Cooper / Buff-tailed Sicklebill (Eutoxeres condamini) feeding on flower nectar, Amazon, Ecuador

David Tipling / Performer from Jiwaka tribe Western Highlands at Mt Hagen show. Head dress has Blue Bird of Paradise (Paradisaea rudolphi) and Black Sicklebill (Epimachus fastosus) feathers. Western Highlands, Papua...

Tim Laman / Pale-billed Sicklebill (Drepanornis bruijnii) male silhouetted against a grey sky. New Guinea

Tim Laman / Pale-billed Sicklebill (Drepanornis bruijnii) female foraging, New Guinea

Tim Laman / Black Sicklebill Bird of Paradise (Epimachus fastuosus) male perched on his display pole, New Guinea

David Tipling / Performer from the Kupop Sing-sing group from Jiwaka Province, performng at Hagen Show at Mount Hagen, Papua New Guinea Wearing head dress of owl wings in head dress and sicklebill feathers. August 20...

David Tipling / Sing-sing group from Western Highlands performing at Hagen Show, Papua New Guinea. With black plumes from the Black Sicklebill a bird of paradise. August 2011.

David Tipling / Brown Sicklebill (Epimachus meyeri) female, Kumul Lodge, Western Highlands, Papua New Guinea

David Tipling / Brown Sicklebill (Epimachus meyeri) female, Kumul Lodge, Western Highlands, Papua New Guinea

Tim Laman / Male Black Sicklebill (Epimachus fastosus) on his display perch. Foja Mountains, Papua, Indonesia, 2007.

Murray Cooper / Buff-tailed Sicklebill (Eutoxeres condamini) on moss-covered branch, Ecuador

Murray Cooper / White-tipped Sicklebill (Eutoxeres aquila) hummingbird parent feeding chicks at nest, Ecuador

Tim Laman / Immature male Brown Sicklebill {Epimachus meyeri} showing transitional plumage to adult male, foraging for insects in a tree stump, Mt. Hagen, Enga Province, Papua New Guinea.

Tim Laman / A young male Brown Sicklebill (Epimachus meyeri) bird of paradise, foraging on the ground for insects, Southwestern slopes of Mt. Hagen, Enga Province, Papua New Guinea.

Tim Laman / Young, subadult male Brown Sicklebill (Epimachus meyeri) bird of paradise in the vicinity of Mt. Hagen, Enga Province, Papua New Guinea.

Tim Laman / Young male Brown Sicklebill (Epimachus meyeri) bird of paradise perched, in the vicinity of Mt. Hagen, Enga Province, Papua New Guinea.

Tim Laman / Female Brown Sicklebill Bird of Paradise (Epimachus meyeri) in the vicinity of Mt. Hagen, Enga Province, Papua New Guinea.

Tim Laman / Female Brown Sicklebill (Epimachus meyeri) bird of paradise perched, in the vicinity of Mt. Hagen, Enga Province, Papua New Guinea.

Tim Laman / Detail of feathers of Brown Sicklebill Bird of Pardise used in traditional headdress, Western Highlands Province, Papua New Guinea. September 2004

Tim Laman / Detail of Black Sicklebill bird of paradise to be used in traditional headdress. Mount Hagen, Western Highlands Province, Papua New Guinea. September 2004

Tim Laman / Feathers of Brown Sicklebill Bird of Paradise in traditional headdress, Mount Hagen, Western Highlands Province, Papua New Guinea. September 2004

Michael & Patricia Fogden / White-tipped Sicklebill (Eutoxeres aquila) hummingbird visiting a Heliconia (Heliconia reticulata) flower in rainforest, Costa Rica

Michael & Patricia Fogden / White-tipped Sicklebill (Eutoxeres aquila) hummingbird visiting a Heliconia (Heliconia reticulata) flower in rainforest, Costa Rica

Michael & Patricia Fogden / White-tipped Sicklebill (Eutoxeres aquila) hummingbird visiting a Heliconia (Heliconia reticulata) flower in rainforest, Costa Rica

Michael & Patricia Fogden / White-tipped Sicklebill (Eutoxeres aquila) perching in rainforest, Costa Rica

RICHARD KIRBY / Black sicklebill bird of paradise male courtship display, Irian Jaya / West Papua, Western New Guinea Arfak Mountains

RICHARD KIRBY / Black sicklebill bird of paradise female at Pandanus plant. Irian Jaya / West Papua, Western New Guinea, Arfak Mountains

RICHARD KIRBY / Black sicklebill bird of paradise male feeding at Pandanus plant, Irian Jaya / West Papua, Western New Guinea

Shane P. White / Brown Sicklebill (Epimachus meyeri) and Ribbon-tailed Astrapia (Astrapia mayeri), Kumul Lodge, Papua New Guinea

Murray Cooper / White-tipped Sicklebill (Eutoxeres aquila) hummingbird feeding on flower nectar, Ecuador

Murray Cooper / White-tipped Sicklebill (Eutoxeres aquila), Ecuador

Tim Laman / Male Black Billed Sicklebill (Falculea palliata) displaying pectoral collar. Papua New Guinea.

Tim Laman / A male Black Sicklebill (Epimachus fastosus) preforming his mating display, New Guinea, NB REPRODUCTION SIZE RESTRICTION - screen grab from video

Tim Laman / A male Black Sicklebill (Epimachus fastosus) preforming his mating display, New Guinea NB REPRODUCTION SIZE RESTRICTION - screen grab from video

Tim Laman / Black Sicklebill Bird of Paradise (Epimachus fastosus) male on his display perch, in mid-display with plumes raised over his head, Papua New Guinea

Tim Laman / Pale-billed Sicklebill (Drepanornis bruijnii) female foraging, Papua New Guinea

Tim Laman / Black Sicklebill Bird of Paradise (Epimachus fastosus) male at his display perch, Papua New Guinea

Tim Laman / Black Sicklebill Bird of Paradise (Epimachus fastosus) male at his display perch, in mid-display with plumes raised over his head, Papua New Guinea

Tim Laman / Black Sicklebill Bird of Paradise (Epimachus fastosus) female plumage bird, Papua New Guinea

Tim Laman / Brown Sicklebill Bird of Paradise (Epimachus meyeri) adult male at calling perch in the canopy, Papua New Guinea

Tim Laman / Brown Sicklebill (Epimachus meyeri) young male, primarily in female plumage, but with some dark feathers on head, Papua New Guinea

Tim Laman / Pale-billed Sicklebill (Drepanornis bruijnii) male, eating a seed, Papua New Guinea

Tim Laman / Pale-billed Sicklebill (Drepanornis bruijnii) male feeding, Papua New Guinea,

Tim Laman / Black Sicklebill (Epimachus fastosus) male perched on his display pole, Papua New Guinea

Konrad Wothe / Brown sicklebill (Epimachus meyeri) female perched in tree. Western Highlands, Papua New Guinea.

Lorraine Bennery / Sickle-billed Vanga (Falculea palliata) Ankarafantsika National Park, Madagascar.