James Christensen / Almirante Robber Frog (Craugastor talamancae), Colon, Panama

Jen Guyton / Robber frog (Craugastor sp.) photographed in studio at Cruces Biological Station, Costa Rica.

Jen Guyton / Robber frog (Craugastor sp.) photographed in studio at Cruces Biological Station, Costa Rica.

Jen Guyton / Robber frog (Craugastor sp.) photographed in studio at Cruces Biological Station, Costa Rica.

Jen Guyton / Robber frog (Craugastor sp.) photographed in studio at Cruces Biological Station, Costa Rica.

Jen Guyton / Robber frog (Craugastor sp.) photographed in studio at Cruces Biological Station, Costa Rica.

Jen Guyton / Robber frog (Craugastor sp.) displays incredible camouflage (crypsis) at Las Cruces Biological Station, Costa Rica.

Suzi Eszterhas / Tilaran Robber Frog (Craugastor mimus), northern Costa Rica

James Christensen / Fitzinger's Robber Frog (Craugastor fitzingeri), Colon, Panama

James Christensen / Fitzinger's Robber Frog (Craugastor fitzingeri), Colon, Panama

James Christensen / Fitzinger's Robber Frog (Craugastor fitzingeri), western slope of the Andes Cloud Forest, Mindo, Ecuador

James Christensen / Fitzinger's Robber Frog (Craugastor fitzingeri) pair in amplexus, western slope of the Andes Cloud Forest, Mindo, Ecuador

Thomas Marent / Southern Frog (Craugastor raniformis), San Cipriano, Cauca, Colombia

Mark Moffett / Rain Frog (Eleutherodactylus sp) portrait on leaf

Michael & Patricia Fogden / Rain Frog (Eleutherodactylus sp) eggs, froglets about to emerge, complete metamorphosis in egg, Costa Rica

Michael & Patricia Fogden / Rain Frog (Eleutherodactylus sp) eggs, froglets about to emerge, complete metamorphosis in egg, Costa Rica

Michael & Patricia Fogden / Halloween Snake (Pliocercus euryzonus) rear-fanged mimic of Coral Snake, swallowing Rain Frog (Eleutherodactylus sp) rainforest, Costa Rica

Michael & Patricia Fogden / Halloween Snake (Pliocercus euryzonus) rear-fanged mimic of Coral Snake, swallowing Rain Frog (Eleutherodactylus sp) rainforest, Costa Rica

Michael & Patricia Fogden / Halloween Snake (Pliocercus euryzonus) rear-fanged mimic of Coral Snake, swallowing Rain Frog (Eleutherodactylus sp) rainforest, Costa Rica

Michael & Patricia Fogden / Hog-nosed Pit Viper (Porthidium nasutus) swallowing a Rain Frog (Eleutherodactylus sp) note use of fangs to manipulate frog into mouth, rainforest, Costa Rica

Michael & Patricia Fogden / Hog-nosed Pit Viper (Porthidium nasutus) swallowing a Rain Frog (Eleutherodactylus sp) note use of fangs to manipulate frog into mouth, rainforest, Costa Rica

Michael & Patricia Fogden / Rain Frog (Eleutherodactylus sp) egg mass with froglets inside metamorphosing, Costa Rica

Michael & Patricia Fogden / Slim-fingered Rain Frog (Eleutherodactylus crassidigitus) pair, in amplexus with eggs being released and fertilized, cloud forest, Costa Rica

Michael & Patricia Fogden / Fer-de-lance (Bothrops asper) snake, juvenile swallowing Rain Frog (Eleutherodactylus sp) rainforest, Costa Rica

Michael & Patricia Fogden / Fer-de-lance (Bothrops asper) snake, juvenile swallowing Rain Frog (Eleutherodactylus sp) in the rainforest, Costa Rica

Michael & Patricia Fogden / Fer-de-lance (Bothrops asper) snake, juvenile swallowing Rain Frog (Eleutherodactylus sp) in the rainforest, Costa Rica

Sebastian Kennerknecht / Evergreen Robber Frog (Craugastor gollmeri) camouflaged in leaf litter, Cocobolo Nature Reserve, Mamoni Valley, Panama

Sean Crane / Fitzinger's Robber Frog (Craugastor fitzingeri), El Valle, Panama

Cyril Ruoso / Fitzinger's Robber Frog (Craugastor fitzingeri), Barro Colorado Island, Panama

Claudio Contreras / Robber Frog (Craugastor sp.), Finca Arroyo Negro, El Triunfo Biosphere Reserve, Chiapas, southern Mexico, April