Jack Jeffrey/ BIA / I'iwi (Drepanis coccinea), Hawaii

Glenn Bartley/ BIA / Red-legged Honeycreeper (Cyanerpes cyaneus), Costa Rica

Bence Mate / Red-legged honeycreeper (Cyanerpes cyaneus) male and juvenile male perched in rain, Costa Rica.

Bence Mate / Red-legged honeycreeper (Cyanerpes cyaneus) perched with Palm tanager (Thraupis palmarum) and Blue-gray tanager (Thraupis episcopus) Laguna del Lagarto, Santa Rita, Costa Rica

Bence Mate / Red-legged honeycreeper (Cyanerpes cyaneus) two males on barbed wire. Costa Rica.

David Tipling / Shining Honeycreeper (Cyanerpes lucidus) La Selva, Costa Rica

Luiz Claudio Marigo / Purple honeycreeper {Cyanerpes caeruleus} Trinidad

Luiz Claudio Marigo / Green honeycreeper {Chlorophanes spiza} Neri Pittier NP, Araqua, Brazil

Luiz Claudio Marigo / Purple honeycreeper {Cyanerpes caeruleus} Trinidad

Nigel Bean / Purple Honeycreeper male, Asa Wright Nature Centre, Trinidad.

Melvin Grey / Red-legged honeycreeper (Cyanerpes cyaneus) adult breeding male, Costa Rica.

Thomas Marent / Green Honeycreeper (Chlorophanes spiza) male, Valle del Cauca, Colombia

Joao Burini / Blue dacnis (Dacnis cayana) male, Sao Luis do Paraitinga, Sao Paulo, Atlantic Forest South-East Reserves UNESCO World Heritage Site, Brazil

Lucas Bustamante / Green honeycreeper (Chlorophanes spiza) portrait, perched on twig, Pinas, El Oro, Ecuador.

Doug Wechsler / Green honeycreeper (Chlorophanes spiza) male, Copalinga Reserve, Ecuador

Phil Savoie / Green honeycreeper (Chlorophanes spiza) male, La Selva Field Station, Costa Rica.

Phil Savoie / Green honeycreeper (Chlorophanes spiza) male, La Selva Field Station, Costa Rica.

Phil Savoie / Green honeycreeper (Chlorophanes spiza), La Selva Field Station, Costa Rica.

Phil Savoie / Green honeycreeper (Chlorophanes spiza) male, La Selva Field Station, Costa Rica.

Phil Savoie / Blue dacnis (Dacnis cayana) female visiting Fruiting shrub (Miconia longifolia) La Selva Field Station, Costa Rica.

Phil Savoie / Green honeycreeper (Chlorophanes spiza) male, La Selva Field Station, Costa Rica.

Glenn Bartley/ BIA / Shining Honeycreeper (Cyanerpes lucidus) male, Costa Rica

Jack Jeffrey/ BIA / I'iwi (Drepanis coccinea) juvenile feeding on flower nectar, Hawaii

Guy Edwardes / Pair of Red-legged honeycreepers (Cyanerpes cyaneus), Costa Rica.

Guy Edwardes / Green honeycreeper (Chlorophanes spiza) perched on a branch, Costa Rica.

Adrian Davies / Green honeycreeper (Chlorophanes spiza) perched, Trinidad

David Tipling / Shining honeycreeper (Cyanerpes lucidus) male in garden, Panama.

Thomas Marent / Green Honeycreeper (Chlorophanes spiza) female, Guacharo Cave National Park, Colombia

Glenn Bartley/ BIA / Green Honeycreeper (Chlorophanes spiza), Costa Rica

Glenn Bartley/ BIA / Shining Honeycreeper (Cyanerpes lucidus), Costa Rica

Melvin Grey / Red-legged honeycreeper (Cyanerpes cyaneus) adult male, Laguna del Lagarto, Costa Rica

Julian Hume / Illustration of extinct birds : Giant scimitar-billed nukupu'u (Hemignathus vorpalis) foraging amongst leaf litter for invertebrate prey, Hawaii.

Julian Hume / Illustration of extinct Hoopoe-billed akialoa (Hemignathus upupirostris) searching for invertebrates on a rotting tree in the coastal forests of Kaua'i. Hawaii.

Julian Hume / Comparison of Giant Scimitar-billed Nukupu'u (Hemignathus vorpalis) (below), compared with adult males of Akiapola'au (Hemignathus munroi) (Extant, endangered) (above) and Kauai Nukupu'u (Hemignathus...

Julian Hume / Illustration of extinct Hawaiian harrier (Circus dossenus) plucking an I'iwi (Vestiaria coccinea) in Koa forest, O'ahu, Hawaii.

Suzi Eszterhas / Shining honeycreeper (Cyanerpes lucidus) male, northern Costa Rica.

Suzi Eszterhas / Red-legged honeycreeper (Cyanerpes cyaneus) male and female, northern Costa Rica.

Suzi Eszterhas / Red-legged honeycreeper (Cyanerpes cyaneus) male northern Costa Rica.

Suzi Eszterhas / Red-legged honeycreeper (Cyanerpes cyaneus) male, northern Costa Rica.

Tim Zurowski/ BIA / Red-legged Honeycreeper (Cyanerpes cyaneus) male, Costa Rica

Tim Zurowski/ BIA / Red-legged Honeycreeper (Cyanerpes cyaneus) male, Costa Rica

Tim Zurowski/ BIA / Red-legged Honeycreeper (Cyanerpes cyaneus) male, Costa Rica

Tim Zurowski/ BIA / Green Honeycreeper (Chlorophanes spiza) male, Costa Rica

Tim Zurowski/ BIA / Green Honeycreeper (Chlorophanes spiza) female, Costa Rica

Tim Zurowski/ BIA / Shining Honeycreeper (Cyanerpes lucidus), Costa Rica

Tim Zurowski/ BIA / Shining Honeycreeper (Cyanerpes lucidus) male, Costa Rica

Tim Zurowski/ BIA / Green Honeycreeper (Chlorophanes spiza) male, Costa Rica

Tim Zurowski/ BIA / Red-legged Honeycreeper (Cyanerpes cyaneus) male, Costa Rica

Jack Jeffrey / Hawaii Creeper (Oreomystis mana), Hawaii

Jack Jeffrey / Hawaii Creeper (Oreomystis mana), Hawaii

Mary McDonald / Green honeycreeper (Chlorophanes spiza) perched on branch, Atlantic coastal jungle, Laguna del Lagarto, Costa Rica, Central America, January.

Jack Jeffrey / I'iwi (Drepanis coccinea) on Ohi'a (Metrosideros sp) tree, Hawaii

Glenn Bartley / Red-legged Honeycreeper (Cyanerpes cyaneus) female, Costa Rica

Luiz Claudio Marigo / Red-legged honeycreeper (Cyanerpes cyaneus) feeding on Grevillea banksii flowers (native of Australia) lowland Southern Bahia Atlantic Rainforest, Estacao Veracel Private Nature Heritage Reserve, muni...

Luiz Claudio Marigo / Blue Dacnis (Dacnis cayana) perched, Atlantic Rainforest, Serrinha do Alambari Environmental Protection Area, Resende, Rio de Janeiro, State, Southeastern Brazil.

Luiz Claudio Marigo / Green Honeycreeper (Chlorophanes spiza) perched, Serra Bonita Private Natural Heritage Reserve (RPPN Serra Bonita) Camacan, Southern Bahia State, Eastern Brazil.

Luiz Claudio Marigo / Blue dacnis (Dacnis cayana) portrait, Serrinha do Alambari, Penedo, Itatiaia, Rio de Janeiro, Brazil.

Luiz Claudio Marigo / Female Blue Dacnis (Dacnis cayana) fighting her own reflection in car mirror, Minas Gerais State, Southeastern Brazil

David Tipling / Shining Honeycreeper (Cyanerpes lucidus) La Selva, Costa Rica.

David Tipling / Cane headdress of Tanagers (Thraupidae) and Honeycreepers (Cyanerpes) worn by the Jivaro of Northern Peru and eastern Ecuador.

Paul Hobson / Shining honeycreeper (Cyanerpes lucidus) Costa Rica

Paul Hobson / Red legged honeycreeper (Cyanerpes cyaneus) profile, Costa Rica

Glenn Bartley / Green Honeycreeper (Chlorophanes spiza) male, Costa Rica

E.J. Peiker / Green Honeycreeper (Chlorophanes spiza) female, Costa Rica

E.J. Peiker / Green Honeycreeper (Chlorophanes spiza) male, Costa Rica

E.J. Peiker / Shining Honeycreeper (Cyanerpes lucidus) female, Costa Rica

E.J. Peiker / Shining Honeycreeper (Cyanerpes lucidus) male, Costa Rica

E.J. Peiker / Red-legged Honeycreeper (Cyanerpes cyaneus) male, Costa Rica

E.J. Peiker / Red-legged Honeycreeper (Cyanerpes cyaneus) female, Costa Rica

Glenn Bartley / Shining Honeycreeper (Cyanerpes lucidus) male, Costa Rica

Suzi Eszterhas / Red-legged Honeycreeper (Cyanerpes cyaneus) male profile, Northern Costa Rica, Central America

Robin Chittenden / Purple Honeycreeper (Cyanerpes caeruleus longirostris) Trinidad, Trinidad and Tobago, April

Robin Chittenden / Green Honeycreeper (Chlorophanes spiza spiza) Trinidad, Trinidad and Tobago, April

Robin Chittenden / Green Honeycreeper (Chlorophanes spiza spiza) Trinidad, Trinidad and Tobago, April

Robin Chittenden / Purple Honeycreeper (Cyanerpes caeruleus longirostris) Trinidad, Trinidad and Tobago, April

Suzi Eszterhas / Red-legged Honeycreeper (Cyanerpes cyaneus) female in rarin, Northern Costa Rica, Central America

David Tipling / (Green Honeycreeper (Chlorophanes spiza) male feeding on berries, La Selva, Costa Rica

Suzi Eszterhas / Red-legged Honeycreeper (Cyanerpes cyaneus) female, northern Costa Rica

Suzi Eszterhas / Red-legged Honeycreeper (Cyanerpes cyaneus) immature male, northern Costa Rica

Suzi Eszterhas / Red-legged Honeycreeper (Cyanerpes cyaneus) female, northern Costa Rica

Suzi Eszterhas / Red-legged Honeycreeper (Cyanerpes cyaneus) male, northern Costa Rica

Suzi Eszterhas / Red-legged Honeycreeper (Cyanerpes cyaneus) male in rain, northern Costa Rica

Suzi Eszterhas / Red-legged Honeycreeper (Cyanerpes cyaneus) male, northern Costa Rica

Suzi Eszterhas / Red-legged Honeycreeper (Cyanerpes cyaneus) male, northern Costa Rica

Suzi Eszterhas / Green Honeycreeper (Chlorophanes spiza) female, northern Costa Rica

Suzi Eszterhas / Green Honeycreeper (Chlorophanes spiza) female, northern Costa Rica

Suzi Eszterhas / Green Honeycreeper (Chlorophanes spiza) male, northern Costa Rica

Suzi Eszterhas / Green Honeycreeper (Chlorophanes spiza) male, northern Costa Rica

Luiz Claudio Marigo / Green honeycreeper (Chlorophanes spiza) male perched on branch in the mountainous Atlantic Rainforest of Serra Bonita Natural Private Heritage Reserve (RPPN Serra Bonita) municipality of Camacan, Sout...

Luiz Claudio Marigo / Green Honeycreeper (Chlorophanes spiza) male perched in branch in mountainous Atlantic Rainforest of Serra Bonita Natural Private Heritage Reserve (RPPN Serra Bonita) municipality of Camacan, Souther...

Luiz Claudio Marigo / Green honeycreeper (Chlorophanes spiza) female perched on branch in mountainous Atlantic Rainforest of Serra Bonita Natural Private Heritage Reserve (RPPN Serra Bonita), municipality of Camacan, South...

Sue Flood / Red legged honeycreeper (Cyanerpes cyaneus) near Boca Tapada, Costa Rica. January 2011

Steve Gettle / Green Honeycreeper (Chlorophanes spiza) male, Costa Rica

Steve Gettle / Green Honeycreeper (Chlorophanes spiza) female, Costa Rica

Steve Gettle / Green Honeycreeper (Chlorophanes spiza) male, Costa Rica

Steve Gettle / Shining Honeycreeper (Cyanerpes lucidus), Costa Rica