Michael & Patricia Fogden / White-winged Brush-Finch (Atlapetes leucopterus) feeding on Hollowheart (Acnistus arborescens) berries in cloud forest, Tandayapa Valley, western slope of Andes, Ecuador

Tom Vezo / Lesser Goldfinch (Carduelis psaltria) male, Santa Rita Mountains, Arizona

Tom Vezo / House Finch (Carpodacus mexicanus) male, Santa Rita Mountains, Arizona

Tom Vezo / House Finch (Carpodacus mexicanus) male, Santa Rita Mountains, Arizona

Tom Vezo / House Finch (Carpodacus mexicanus) male, Santa Rita Mountains, Arizona

Hanne Jens Eriksen / Hodgson's rosy finch {Leucosticte nemoricola} Kyrgyzstan, Asia Plain mountain

Mark Moffett / Woodpecker Finch (Camarhynchus pallidus), Sierra Negra, Isabella Island, Galapagos Islands, Ecuador

Mark Moffett / Vegetarian Tree Finch (Camarhynchus crassirostris) eating, Sierra Negra, Isabella Island, Galapagos Islands, Ecuador

Tui De Roy / Mourning Sierra-Finch (Phrygilus fruticeti) portrait, on rock, Colca Canyon, Southern Andes, Peru

Tui De Roy / Darwin's Finch (Geospiza sp) group picking ticks from Volcan Alcedo Giant Tortoise (Chelonoidis nigra vandenburghi), Alcedo Volcano, Isabella Island, Galapagos Islands, Ecuador