Pete Oxford / Glass Frog (Hyalinobatrachium aureoguttatum) underside showing internal organs, native to South America

Pete Oxford / Glass Frog (Espadarana callistomma / centrolenidae). Captive. Choc Region of northwest Ecuador.

Pete Oxford / Portrait of an Emerald Glass Frog (Espadarana / Centrolenella prosoblepon). Captive. Choc Region of northwest Ecuador.

Pete Oxford / Northern Glassfrog (Hyalinobatrachium fleischmanni) underside showing internal organs, northwest Ecuador

Edwin Giesbers / Ghost glass frog (Centrolenella ilex) portrait, Costa Rica

Christian Ziegler / Plantation Glass Frog (Hyalinobatrachiumácolymbiphyllum) is nearly transparent including the bones, only digestive tract is visible, Barro Colorado Island, Panama

Heidi & Hans-Juergen Koch / Glass Frog (Cochranella antisthenesi) transparent skin shows body filled with eggs, very rare and fragile frog, native to Central and South America

Doug Wechsler / Pacific giant glass frog (Centrolenella geckoideum). NW Andes (2550m), Carchi Province, Ecuador, South America

Doug Wechsler / Glass frog in rainforest understorey, Ecuador

Morley Read / Resplendent cochran frog (Cochranella resplendens) on a leaf in the rainforest understory, Pastaza Province, Ecuador. (non-ex)

Morley Read / Resplendent cochran frog (Cochranella resplendens) on a leaf of a flowering Centropogon plant in the rainforest understory, Pastaza Province, Ecuador. (non-ex)

Morley Read / Resplendent cochran frog (Cochranella resplendens) on a leaf in the rainforest understory, with an ant walking past, Pastaza Province, Ecuador, April. (non-ex)