Phil Savoie / Reticulated glass frog (Hyalinobatrachium valerioi) La Selva Field Station, Costa Rica.

Edwin Giesbers / Reticulated glass frog (Hyalinobatrachium valerioi) captive, occurs in Colombia, Costa Rica, Ecuador, and Panama

Pete Oxford / Glass Frog (Hyalinobatrachium aureoguttatum) pair, native to South America

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

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

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

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

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

Phil Savoie / Glass frog on heliconia flower. (Centrolenella fleischmanni) Belize

Pete Oxford / Glass frog {Hyalinobatrachium sp} Amazonia, SE Ecuador

Phil Savoie / Glass frog guarding its eggs (Centrolenella fleischmanni) Belize

Phil Savoie / Glass frog parent guarding eggs (Centrolenella fleischmanni) Belize