Paul Hobson / Resplendent quetzal (Pharomachrus mocinno) male perched on branch. Costa Rica.

Oscar Dewhurst / Malabar trogon (Harpactes fasciatus) female perched on branch. Goa, India.

Staffan Widstrand / Wild Wonders of China / Red-headed trogon (Harpactes erythrocephalus) Tongbiguan Nature Reserve, Dehong, Yunnan, China

Staffan Widstrand / Wild Wonders of China / Red-headed trogon (Harpactes erythrocephalus) Tongbiguan Nature Reserve, Dehong, Yunnan, China

Staffan Widstrand / Wild Wonders of China / Red-headed trogon (Harpactes erythrocephalus) Tongbiguan Nature Reserve, Dehong, Yunnan, China

Lucas Bustamante / Masked trogon (Trogon personatus) Mindo, Pichincha, Ecuador

David Pattyn / Masked trogon (Trogon personatus) couple mating in cloud forest environment, Bellavista private reserve, Mindo, Pichincha, Ecuador, July

David Pattyn / Masked trogon (Trogon personatus) female perched, Bellavista private reserve, Mindo, Pichincha, Ecuador, July

David Pattyn / Masked trogon (Trogon personatus) male perched, Bellavista private reserve, Mindo, Pichincha, Ecuador, July

David Pattyn / Masked trogon (Trogon personatus) male perched, Bellavista private reserve, Mindo, Pichincha, Ecuador, July

David Pattyn / Masked trogon (Trogon personatus) female perched, Bellavista private reserve, Mindo, Pichincha, Ecuador, July

Paul Hobson / Resplendent quetzal (Pharomachrus mocinno) female perched in tree. Costa Rica.

Joao Burini / Surucua trogon (Trogon surrucura) male, Intervales State Park, Sao Paulo, Atlantic Forest South-East Reserves, UNESCO World Heritage Site, Brazil.

Joao Burini / Surucua trogon (Trogon surrucura) Ribeirao Grande, Sao Paulo, Intervales State Park, Atlantic Forest South-East Reserves, UNESCO World Heritage Site, Brazil.

Lucas Bustamante / Male Collared trogon (Trogon collaris) perched on twig, Sumaco National Park, Napo, Ecuador.

Lucas Bustamante / Female Blue-crowned trogon (Trogon curucui) perched on twig, Tambopata, Madre de Dios, Peru.

Lucas Bustamante / Male Masked trogon (Trogon personatus) portrait, Mindo, Pichincha, Ecuador.

Lucas Bustamante / Male Choco trogon (Trogon comptus) perched on branch, Mashpi, Pichincha, Ecuador.

Lucas Bustamante / Masked trogon (Trogon personatus) male perched, Mindo, Pichincha, Ecuador.

Lucas Bustamante / Golden-headed quetzal (Pharomachrus auriceps) Mindo, Pichincha, Ecuador .

Nick Hawkins / Resplendant quetzal (Pharomachrus mocinno) male with wild avocado fruit. Talamanca Range, Talamanca Range-La Amistad Reserves / La Amistad National Park UNESCO Natural World Heritage Site, Costa Rica.

Nick Hawkins / Resplendant quetzal (Pharomachrus mocinno) male in nesting cavity, Talamanca Range, Talamanca Range-La Amistad Reserves / La Amistad National Park UNESCO Natural World Heritage Site, Costa Rica.

Nick Hawkins / Resplendant quetzal (Pharomachrus mocinno) male leaving nest cavity.Talamanca Range, Talamanca Range-La Amistad Reserves / La Amistad National Park UNESCO Natural World Heritage Site, Costa Rica.

Christophe Courteau / Male Resplendent quetzal (Pharomachrus mocinno) taking off, Central Highlands, Costa Rica.

Nick Garbutt / Male Resplendent Quetzal (Pharomachrus mocinno) in cloud forest. Los Quetzales National Park, Savegre River Valley, Talamanca Range, Costa Rica, Central America.

Nick Garbutt / Male Resplendent Quetzal (Pharomachrus mocinno) in cloud forest. Los Quetzales National Park, Savegre River Valley, Talamanca Range, Costa Rica, Central America.

Nick Garbutt / Male Resplendent Quetzal (Pharomachrus mocinno) in cloud forest. Los Quetzales National Park, Savegre River Valley, Talamanca Range, Costa Rica, Central America.

Nick Garbutt / Male Resplendent Quetzal (Pharomachrus mocinno) in cloud forest. Los Quetzales National Park, Savegre River Valley, Talamanca Range, Costa Rica, Central America.

Melvin Grey / Masked trogon (Trogon personatus) adult female, Tandayapa Lodge, Mindo, Ecuador

Melvin Grey / Amazonian white-tailed trogon (Trogon viridis viridis) adult male sitting on a branch in the rainforest. Asa Wright, Trinidad

Melvin Grey / Amazonian white-tailed trogon (Trogon viridis viridis) adult female sitting in rainforest, Asa Wright, Trinidad.

John Cancalosi / Baird's trogon (Trogon bairdii) male at rest in tropical rainforest, Costa Rica

John Cancalosi / Baird's trogon (Trogon bairdii) male at rest in tropical rainforest, Costa Rica

Cyril Ruoso / Slaty-tailed trogon (Trogon massena) perched in tropical rainforest. Barro Colorado Island, Gatun Lake, Panama Canal, Panama.

Cyril Ruoso / Slaty-tailed trogon (Trogon massena) perched in tropical rainforest. Barro Colorado Island, Gatun Lake, Panama Canal, Panama.

Lucas Bustamante / Collared trogon (Trogon collaris) perched on a branch. Mindo, Pichincha, Ecuador.

Hermann Brehm / Blue-crowned trogon (Trogon curucui) Pantanal, Brazil.

Luiz Claudio Marigo / Black-throated Trogon (Trogon rufus) Atlantic Rainforest, Serra do Mar mountains, Bananal, Sao Paulo State, Brazil.

Luiz Claudio Marigo / Black-tailed Trogon (Trogon melanurus) calling, Cerrado, Mato Grosso State, Western Brazil.

Luiz Claudio Marigo / Black-tailed Trogon (Trogon melanurus) calling, Cerrado, Mato Grosso State, Western Brazil.

Konrad Wothe / Resplendent quetzal (Pharomachrus mocinno costaricensis) male in flight, Costa Rica.

Dong Lei / Red-headed Trogon (Harpactes erythrocephalus) perched, Gaoligong Mountain National Nature Reserve, Tengchong county, Yunnan Province, China, Asia

Roland Seitre / Resplendent quetzal (Pharomachrus mocinno) male rear view of tail, Monteverde Cloud Forest Reserve / Reserva Biologica Bosque Nuboso Monteverde, Costa Rica.

Roland Seitre / Resplendent quetzal (Pharomachrus mocinno) female, Monteverde Cloud Forest Reserve / Reserva Biologica Bosque Nuboso Monteverde, Costa Rica.

Roland Seitre / Resplendent quetzal (Pharomachrus mocinno) male, Copey, Costa Rica.

Roland Seitre / Resplendent quetzal (Pharomachrus mocinno) male, Monteverde Cloud Forest Reserve / Reserva Biologica Bosque Nuboso Monteverde, Costa Rica.

David Tipling / Resplendent Quetzal (Pharomachrus mocinno) male leaving nest, Central Highlands, Costa Rica, March.

Roland Seitre / Resplendent quetzal (Pharomachrus mocinno) close up of feathers, captive, from Meso-America.

Roland Seitre / Hispaniolan trogon (Priotelus roseigaster) captive, from Hispaniola.

Roland Seitre / Resplendent quetzal (Pharomachrus mocinno) close up of feathers, captive, from Meso-America.

Roland Seitre / Resplendent quetzal (Pharomachrus mocinno) close up of tail feathers, captive, from Meso-America.

Roland Seitre / Resplendent quetzal (Pharomachrus mocinno) close up of wing and tail feathers, captive, from Meso-America.

Roland Seitre / Cuban Trogon (Priotelus temnurus) captive. Jacobo Lacs breeding facilities, Colon, Cuba.

Roland Seitre / Cuban Trogon (Priotelus temnurus) captive. Jacobo Lacs breeding facilities, Colon, Cuba.

Roland Seitre / Cuban Trogon (Priotelus temnurus) captive. Jacobo Lacs breeding facilities, Colon, Cuba.

Roland Seitre / Cuban Trogon (Priotelus temnurus) captive. Jacobo Lacs breeding facilities, Colon, Cuba.

Roland Seitre / Resplendent quetzal (Pharomachrus mocinno) male on branch, Costa Rica.

Roland Seitre / Cuban Trogon (Priotelus temnurus) captive. Jacobo Lacs breeding facilities, Colon, Cuba.

Roland Seitre / Cuban Trogon (Priotelus temnurus) captive. Jacobo Lacs breeding facilities, Colon, Cuba.

Roland Seitre / Cuban Trogon (Priotelus temnurus) captive. Jacobo Lacs breeding facilities, Colon, Cuba.

Roland Seitre / Resplendent quetzal (Pharomachrus mocinno) male on branch, Costa Rica.

Roland Seitre / Cuban Trogon (Priotelus temnurus) captive. Jacobo Lacs breeding facilities, Colon, Cuba.

Roland Seitre / Cuban Trogon (Priotelus temnurus) captive. Jacobo Lacs breeding facilities, Colon, Cuba.

Roland Seitre / Cuban Trogon (Priotelus temnurus) captive, from Cuba.

Robin Chittenden / Green-backed Trogon (Trogon viridis viridis) Trinidad, Trinidad and Tobago, April

Suzi Eszterhas / Violaceous Trogon (Trogon violaceus) male perched on branch, Northern Costa Rica, Central America

David Tipling / Violaceous Trogon (Trogon violaceus) La Selva, Costa Rica

Luiz Claudio Marigo / Amazonian white tailed / Green backed trogon (Trogon viridis) female perched in Tableland Atlantic Rainforest, Vale Natural Reserve, municipality of Linhares, Espa­rito Santo State, Eastern Brazil.

Robin Chittenden / Guianan trogon (Trogon violaceus) perched, Trinidad and Tobago.

Nick Garbutt / Resplendent quetzal (Pharomachrus mocinno) male, perched on lichen covered branch with berry in beak, in montane rainforest, Talamanca, Costa Rica.

Richard Flack / Narina trogon (Apaloderma narina) male, perched on branch, Coutada 11, Mozambique.

Richard Flack / Narina trogon (Apaloderma narina) male, perched on branch, Coutada 11, Mozambique.

Daniel Nunez / Resplendent quetzal (Pharomachrus mocinno) female, arriving at nest hole in tree trunk with food for chicks, El Mirador Rey Tepepul Municipal Regional Park, Santiago Atitlan, Guatemala. Cropped.

Daniel Nunez / Resplendent quetzal (Pharomachrus mocinno) female, perched at entrance to nest hole with food for chicks, El Mirador Rey Tepepul Municipal Regional Park, Santiago Atitlan, Guatemala. Cropped.

Daniel Nunez / Resplendent quetzal (Pharomachrus mocinno) female, perched on branch carrying food for chicks in its beak, El Mirador Rey Tepepul Municipal Regional Park, Santiago Atitlan, Guatemala. Cropped.

Daniel Nunez / Resplendent quetzal (Pharomachrus mocinno) female, taking flight from nest hole, El Mirador Rey Tepepul Municipal Regional Park, Santiago Atitlan, Guatemala. Cropped.

Daniel Nunez / Resplendent quetzal (Pharomachrus mocinno) male, taking flight from nest hole, El Mirador Rey Tepepul Municipal Regional Park, Santiago Atitlan, Guatemala. Cropped.

Daniel Nunez / Resplendent quetzal (Pharomachrus mocinno) male, taking flight from nest hole, El Mirador Rey Tepepul Municipal Regional Park, Santiago Atitlan, Guatemala. Cropped.

Daniel Nunez / Resplendent quetzal (Pharomachrus mocinno) male, peering out from nest hole in tree trunk, El Mirador Rey Tepepul Municipal Regional Park, Santiago Atitlan, Guatemala. Cropped.

Daniel Nunez / Resplendent quetzal (Pharomachrus mocinno) male, perched on branch, El Mirador Rey Tepepul Municipal Regional Park, Santiago Atitlan, Guatemala. Cropped.

Roman Willi / Resplendent quetzal (Pharomachrus mocinno) male, perched in lichen covered tree in cloud forest, Monteverde, Costa Rica.

Daniel Nunez / Resplendent quetzal (Pharomachrus mocinno) male, perched on branch, Atitlan Volcano, Solola, Guatemala. Cropped

Maxime Aliaga / Blue-crowned trogon (Trogon curucui) perched on branch. Tambopata National Reserve, Madre de Dios, Peru.

Lucas Bustamante / Collared trogon (Trogon collaris) male, head portrait, Choco rainforest, Pichincha, Ecuador.

Guy Edwardes / Resplendent quetzal (Pharomachrus mocinno) male arriving with food at nest hole in cloudforest, Cerro de la Muerte, Costa Rica.

Andy Rouse / Male Resplendent quetzal (Pharomachrus mocinno) perched on branch near nest, Costa Rica.

Karine Aigner / Portrait of a Masked trogon (Trogon personatus). Female. Mindo, Ecuador.

Karine Aigner / Masked trogon (Trogon personatus). female. Mindo, Ecuador.

Karine Aigner / Masked trogon (Trogon personatus). female. Mindo, Ecuador.

Karine Aigner / Masked trogon (Trogon personatus) perched on a branch. Mindo, Ecuador.

Karine Aigner / Portrait of a male Masked trogon (Trogon personatus) eating an insect. Mindo, Ecuador.

Karine Aigner / Masked trogon (Trogon personatus) male, Amazon Rainforest. Ecuador.

Maxime Aliaga / Colored trogon (Trogon collaris), Mindo, Choco, Ecuador

Claudio Contreras / Resplendent quetzal (Pharomachrus mocinno) close up of feathers, captive, Chiapas, southern Mexico, IUCN Near Threatened, April