Glenn Bartley/ BIA / Blue-winged Mountain-Tanager (Anisognathus somptuosus), Andes, Colombia

Glenn Bartley/ BIA / Patagonian Sierra-Finch (Phrygilus patagonicus) male calling, Andes, Chile

Agustin Esmoris / Bananaquit (Coereba flaveola) on flower, Argentina

Thomas Marent / Bay-headed Tanager (Tangara gyrola), Guacharo Cave National Park, Colombia

Thomas Marent / Bay-headed Tanager (Tangara gyrola), Sierra Nevada de Santa Marta, Colombia

Glenn Bartley/ BIA / Blue-gray Tanager (Thraupis episcopus), Costa Rica

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

Glenn Bartley/ BIA / Black-capped Tanager (Tangara heinei), Colombia

Glenn Bartley/ BIA / Gilt-edged Tanager (Tangara cyanoventris), Atlantic Rainforest, Brazil

Glenn Bartley/ BIA / Brassy-breasted Tanager (Tangara desmaresti), Atlantic Rainforest, Brazil

Glenn Bartley/ BIA / Blue Dacnis (Dacnis cayana), Atlantic Rainforest, Brazil

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.

Ole Jorgen Liodden / Woodpecker finch (Camarhynchus pallidus) using stick as a tool for foraging, Galapagos. Endemic.

Pete Oxford / Common Cactus-Finch (Geospiza scandens) feeding on cactus, Galapagos Islands, Ecuador

Tui De Roy / Large Ground Finch (Geospiza magnirostris) feeding on a seed, Ecuador

Cyril Ruoso / Blue-and-black Tanager (Tangara vassorii) at 4500 meters, Cordillera Blanca Mountain Range, Andes, Peru

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

D. Parer & E. Parer-Cook / Woodpecker Finch (Camarhynchus pallidus) using tool to dislodge grub, Santa Cruz Island, Galapagos Islands, Ecuador

D. Parer & E. Parer-Cook / Galapagos Land Iguana (Conolophus subcristatus) with a Small Ground-Finch (Geospiza fuliginosa) on its head removing parasites, Galapagos Islands, Ecuador

D. Parer & E. Parer-Cook / Woodpecker Finch (Camarhynchus pallidus) using tool to dislodge grub, Santa Cruz Island, Galapagos Islands, Ecuador

Murray Cooper / Bananaquit (Coereba flaveola) in lowland rainforest, Ecuador

Pete Oxford / Red-crested Cardinal (Paroaria coronata) perched on branch, Pantanal, Brazil

Mark Moffett / Large Ground Finch (Geospiza magnirostris) endemic species, extra large bill for cracking large seeds, largest of Darwin's 13 Finches, Santiago Island, Galapagos Islands, Ecuador

Pete Oxford / Golden Tanager (Tangara arthus) perched in Manu cloud forest, Peru

Tui De Roy / Common Cactus-Finch (Geospiza scandens) feeding on Opuntia (Opuntia sp) cactus blossom, Academy Bay, Santa Cruz Island, Galapagos Islands, Ecuador

Tui De Roy / Common Cactus-Finch (Geospiza scandens) feeding on (Opuntia sp) Common Cactus Fruit, Santa Fe Island, Galapagos Islands, Ecuador

Tui De Roy / Woodpecker Finch (Camarhynchus pallidus) using cactus spine to extract grub from dead wood, Santa Cruz Island, Galapagos Islands, Ecuador

David Pike / Grey-hooded sierra finch, (Phrygilus gayi), Farellones, Chile.

Oscar Dewhurst / Grass-green tanager (Chlorornis riefferii) perched on lichen-covered branch in the cloud forest. Wayqech Biological Research Station, Peru. April

Oscar Dewhurst / Scarlet-bellied mountain-tanager (Anisognathus igniventris) feeding on caterpillar in the Peruvian cloud forest. Wayqecha Biological Research Station, Peru. April. Cropped

Oscar Dewhurst / Masked flowerpiercer (Diglossopis cyanea) perched on branch, showing its uniquely-shaped beak. Cusco, Peru. September. Cropped

Oscar Dewhurst / Masked flowerpiercer (Diglossopis cyanea) feeding on flowers, showing its uniquely-shaped beak. Cusco, Peru. September. Cropped

Lucas Bustamante / Blue-Grey Tanagers (Thraupis episcopus). Yasuni National Park, Orellana, Ecuador

John Shaw / Yellow-billed cardinal (Paroaria capitata). Pantanal, Brazil, September.

Marie Read / Western tanager (Piranga ludoviciana), male perched on aspen branch in spring, Mono Lake Basin, California, USA, May.

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

Nick Hawkins / Small ground-finch (Geospiza fuliginosa) singing whilst perched on branch. Isabela Island, Galapagos.

Nick Hawkins / Small ground-finch (Geospiza fuliginosa). Santa Cruz Island , Galapagos.

Nick Hawkins / Medium ground-finch (Geospiza fortis) perched in tree. Isabela Island, Galapagos.

Nick Hawkins / Small ground finch (Geospiza fuliginosa) feeding on ectoparasites found on Marine iguana (Amblyrhynchus cristatus). Isabela Island, Galapagos.

Nick Hawkins / Small ground finch (Geospiza fuliginosa) standing on Marine iguana (Amblyrhynchus cristatus) leg. Finches feed on ectoparasites on iguanas. Isabela Island, Galapagos.

Nick Hawkins / Small ground finch (Geospiza fuliginosa) feeding on ectoparasites on Marine iguana (Amblyrhynchus cristatus) leg. Isabela Island, Galapagos.

Nick Hawkins / Small ground finch (Geospiza fuliginosa) feeding on ectoparasites whilst standing on Marine iguana (Amblyrhynchus cristatus) leg. Isabela Island, Galapagos.

Nick Hawkins / Small ground finch (Geospiza fuliginosa) standing on Marine iguana (Amblyrhynchus cristatus) leg. The finches feed on ectoparasites on iguanas. Isabela Island, Galapagos.

Nick Hawkins / Common cactus finch (Geospiza scandens) perched on Prickly pear (Opuntia). San Cristobal Island, Galapagos.

Nick Hawkins / Cocos Island finch (Pinaroloxias inornata) standing on rock. Cocos Island National Park, Costa Rica.

Nick Hawkins / Common cactus finch (Geospiza scandens) perched on twigs. San Cristobal Island, Galapagos.

Nick Hawkins / Cocos Island finch (Pinaroloxias inornata) amongst ferns. Cocos Island National Park, Costa Rica.

Nick Hawkins / Cocos Island finch (Pinaroloxias inornata) perched on branch. Cocos Island National Park, Costa Rica.

Paul Hobson / Slaty flower-piercer (Diglossa plumbea) opening base of flower and feeding. Costa Rica.

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

Thomas Marent / Black-faced Dacnis (Dacnis lineata), Rio Claro Nature Reserve, Colombia

Thomas Marent / Saffron Finch (Sicalis flaveola), Valle del Cauca, Colombia

Thomas Marent / Saffron Finch (Sicalis flaveola), Valle del Cauca, Colombia

Thomas Marent / Plumbeous Sierra-Finch (Phrygilus unicolor) female, Los Nevados National Natural Park, Colombia

Thomas Marent / Blue-winged Mountain-Tanager (Anisognathus somptuosus), Rio Blanco Nature Reserve, Colombia

Thomas Marent / Scarlet-bellied Mountain-Tanager (Anisognathus igniventris), Los Nevados National Natural Park, Colombia

Thomas Marent / Multicolored Tanager (Chlorochrysa nitidissima) male, Valle del Cauca, Colombia

Thomas Marent / Multicolored Tanager (Chlorochrysa nitidissima) male, Valle del Cauca, Colombia

Thomas Marent / Multicolored Tanager (Chlorochrysa nitidissima) female, Valle del Cauca, Colombia

Thomas Marent / Palm Tanager (Thraupis palmarum), Valle del Cauca, Colombia

Thomas Marent / Blue-gray Tanager (Thraupis episcopus), Pereira, Colombia

Thomas Marent / Golden-naped Tanager (Tangara ruficervix), Valle del Cauca, Colombia

Thomas Marent / Saffron-crowned Tanager (Tangara xanthocephala) parent bringing food to fledgling, Valle del Cauca, Colombia

Thomas Marent / Saffron-crowned Tanager (Tangara xanthocephala), Valle del Cauca, Colombia

Thomas Marent / Blue-necked Tanager (Tangara cyanicollis), Selva de Ventanas Natural Reserve, Colombia

Thomas Marent / Blue-necked Tanager (Tangara cyanicollis), Selva de Ventanas Natural Reserve, Colombia

Thomas Marent / Hooded Mountain-Tanager (Buthraupis montana) during rainfall, Putumayo, Colombia

Thomas Marent / Hooded Mountain-Tanager (Buthraupis montana) during rainfall, Putumayo, Colombia

Glenn Bartley/ BIA / Lacrimose Mountain-Tanager (Anisognathus lacrymosus), Andes, Colombia

Glenn Bartley/ BIA / Golden Tanager (Tangara arthus), Andes, Colombia

Glenn Bartley/ BIA / Blue-winged Mountain-Tanager (Anisognathus somptuosus), Andes, Colombia

Glenn Bartley/ BIA / Blue-winged Mountain-Tanager (Anisognathus somptuosus), Andes, Colombia

Glenn Bartley/ BIA / Scarlet-bellied Mountain-Tanager (Anisognathus igniventris), Andes, Colombia

Glenn Bartley/ BIA / Scarlet-bellied Mountain-Tanager (Anisognathus igniventris), Andes, Colombia

Glenn Bartley/ BIA / Patagonian Sierra-Finch (Phrygilus patagonicus) male, Andes, Chile

Luke Massey / Yellow billed cardinal (Paroaria capitata) drinks Pantanal, Brazil.

Joao Burini / Rufous headed tanager (Hemithraupis ruficapilla) male, Intervales State Park, Sao Paulo, Atlantic Forest South-East Reserves, UNESCO World Heritage Site, Brazil.

Joao Burini / Green-headed tanager (Tangara seledon) perching on branch, Intervales State Park, Sao Paulo, Atlantic Forest South-East Reserves, UNESCO World Heritage Site, Brazil.

Joao Burini / Black-goggled tanager (Trichothraupis melanops) male, Intervales State Park, Sao Paulo, Atlantic Forest South-East Reserves, UNESCO World Heritage Site, Brazil.

Joao Burini / Magpie tanager (Cissopis leverianus) Parque do Zizo Private Reserve, Sao Paulo, Atlantic Forest South-East Reserves UNESCO World Heritage Site, Brazil.

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 / Silver-throated tanager (Tangara icterocephala) eating Pico-pico fruit. Buenaventura Ecological Reserve, Ecuador.

Doug Wechsler / Rufous-throated tanager (Tangara rufigula) Mashpi Cloud Forest Reserve, Ecuador. December.

Doug Wechsler / Plumbeous sierra-finch (Phrygilus unicolor) Antisana Ecological Reserve, Ecuador

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

Doug Wechsler / Golden-naped tanager (Tangara ruficervix) Mashpi Cloud Forest Reserve, Ecuador.

Doug Wechsler / Golden tanager (Tangara arthus) adult, Mashpi Cloud Forest Reserve, Ecuador.

Doug Wechsler / Flame-faced tanager (Tangara parzudakii) Mashpi Cloud Forest Reserve, Ecuador.

Phil Savoie / Blue grey tanager (Thraupis episopus) La Selva Field Station, Costa Rica.

Phil Savoie / Blue grey tanager (Thraupis episopus) La Selva Field Station, Costa Rica.

Phil Savoie / Golden-hooded tanager (Tangara larvata) La Selva Field Station, Costa Rica.

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