Michael & Patricia Fogden / Harlequin Frog (Atelopus varius) displaying warning coloration, Monteverde, Costa Rica

ZSSD / Panamanian Golden Frog (Atelopus zeteki) pair in amplexus, native to Panama

Michael & Patricia Fogden / Harlequin Frog (Atelopus varius) displaying colorful warning colors, cloud forest, Costa Rica

Thomas Marent / Condoto Stubfoot Toad (Atelopus spurrelli), Utria National Park, Colombia

Thomas Marent / Condoto Stubfoot Toad (Atelopus spurrelli), Utria National Park, Colombia

Thomas Marent / Condoto Stubfoot Toad (Atelopus spurrelli) pair in amplexus, Utria National Park, Colombia

Roland Seitre / Grenouille Harlequin Frog (Atelopus sp.), a newly discovered species. Captive. Cali Zoo, Cali, Colombia, 2010.

Thomas Marent / Pebas Stubfoot Toad (Atelopus spumarius), Colombia

Thomas Marent / Pebas Stubfoot Toad (Atelopus spumarius) pair in amplexus, Colombia

Pete Oxford / Pebas Stubfoot Toad (Atelopus spumarius), Mapari River, Rupununi, Guyana

Pete Oxford / Pebas Stubfoot Toad (Atelopus spumarius), Mapari River, Rupununi, Guyana

Pete Oxford / Pebas Stubfoot Toad (Atelopus spumarius), Mapari River, Rupununi, Guyana

James Christensen / Sapo Limosa (Atelopus limosus) encounter between male toads, loser pressing abdomen against substrate, central Panama

James Christensen / Sapo Limosa (Atelopus limosus) toad male, central Panama

James Christensen / Sapo Limosa (Atelopus limosus) encounter between male toads, loser pressing abdomen against substrate, central Panama

James Christensen / Sapo Limosa (Atelopus limosus) toad males fighting, central Panama

James Christensen / Sapo Limosa (Atelopus limosus) toad male, central Panama

James Christensen / Sapo Limosa (Atelopus limosus) toad male, central Panama

James Christensen / Sapo Limosa (Atelopus limosus) toad pair in amplexus being bitten by midges, central Panama

James Christensen / Sapo Limosa (Atelopus limosus), Colon, Panama

James Christensen / Sapo Limosa (Atelopus limosus), Colon, Panama

Piotr Naskrecki / Central Coast Stubfoot Toad (Atelopus franciscus), Brownsberg Reserve, Surinam

James Christensen / Sapo Limosa (Atelopus limosus) pair in amplexus, plagued by Biting Midges (Ceratopogonidae), Panama

James Christensen / Sapo Limosa (Atelopus limosus) pair in amplexus, plagued by Biting Midges (Ceratopogonidae), Panama

James Christensen / Sapo Limosa (Atelopus limosus) pair in amplexus, plagued by Biting Midges (Ceratopogonidae), Panama

ZSSD / Panamanian Golden Frog (Atelopus zeteki), critically endangered species native to Panama

ZSSD / Panamanian Golden Frog (Atelopus zeteki) critically endangered species native to Panama, San Diego Zoo, California

ZSSD / Panamanian Golden Frog (Atelopus zeteki) critically endangered species native to Panama, San Diego Zoo, California

Thomas Marent / Cayenne Stubfoot Toad (Atelopus flavescens) portrait, French Guiana

Michael & Patricia Fogden / Harlequin Frog (Atelopus varius) pair in amplexus, Costa Rica

Michael & Patricia Fogden / Toad (Atelopus senex) on a leaf in the rainforest, South America

Michael & Patricia Fogden / Fire-bellied Frog (Atelopus ignescens) portrait, extinct animal, Cotopaxi Volcano, Ecuador

Michael & Patricia Fogden / Panamanian Golden Frog (Atelopus zeteki) displaying warning coloration, Panama

Michael & Patricia Fogden / Panamanian Golden Frog (Atelopus zeteki) displaying warning coloration, Panama

Michael & Patricia Fogden / Panamanian Golden Frog (Atelopus zeteki) displaying warning coloration, Panama

Michael & Patricia Fogden / Rancho Grande Harlequin Frog (Atelopus cruciger) displaying warning coloration, Rancho Grande, Venezuela

Michael & Patricia Fogden / Harlequin Frog (Atelopus varius) male and female in amplexus, South America

Michael & Patricia Fogden / Harlequin Frog (Atelopus varius) displaying warning coloration, Braulio Carrillo National Park, Costa Rica

Michael & Patricia Fogden / Harlequin Frog (Atelopus varius) female showing warning coloration, Monteverde, Costa Rica

Michael & Patricia Fogden / Harlequin Frog (Atelopus varius) female showing warning coloration, Monteverde, Costa Rica

Michael & Patricia Fogden / Harlequin Frog (Atelopus varius) female showing warning coloration, Talamancas, Costa Rica

Michael & Patricia Fogden / Harlequin Frog (Atelopus varius) displaying warning coloration, Monteverde, Costa Rica, critically endangered

Michael & Patricia Fogden / Rancho Grande Harlequin Frog (Atelopus cruciger) displaying warning coloration, Rancho Grande, Venezuela

Michael & Patricia Fogden / Rancho Grande Harlequin Frog (Atelopus cruciger) displaying warning coloration, Rancho Grande, Venezuela

Michael & Patricia Fogden / Harlequin Frog (Atelopus varius) displaying warning coloration, Monteverde, Costa Rica

Pete Oxford / Harlequin frog {Atelopus sp} Amazonia, Ecuador

Pete Oxford / Harlequin frog {Atelopus sp} Amazonia, Ecuador

Pete Oxford / Harlequin frog {Atelopus sp} Amazonia, Ecuador

Michael & Patricia Fogden / Fire-bellied Snake (Leimadophis epinephalus) swallowing a poisonous Harlequin Frog (Atelopus varius) cloud forest, Costa Rica

Pete Oxford / Harlequin Frog (Atelopus varius) on forest floor, Amazon, southeast Ecuador

Claus Meyer / Toad (Atelopus sp) portrait on leaf litter, Amazon ecosystem, Brazil

Claus Meyer / Toad (Atelopus sp) portrait on leaf litter, Amazon ecosystem, Brazil

Michael & Patricia Fogden / Panamanian Golden Frog (Atelopus zeteki) displaying warning colors, cloud forest, Panama

Claus Meyer / Toad (Atelopus sp) portrait on leaf litter, Amazon ecosystem, Brazil

Piotr Naskrecki / Central Coast Stubfoot Toad (Atelopus franciscus), Brownsberg Reserve, Surinam

Thomas Marent / Cayenne Stubfoot Toad (Atelopus flavescens), Kaw, French Guiana