Amphibians
Emerald Glass Frog
Espadarana prosoblepon · also called emerald glass frogs
Turn an emerald glass frog gently to look at its underside, and its beating heart is visible right through the skin, working steadily beneath a body otherwise coloured a vivid, leaf-matching green. From above, it disappears into the foliage; from below, it barely bothers hiding anything at all.
Overview
The emerald glass frog, Espadarana prosoblepon, is a small, translucent-bellied amphibian native to rainforest stream habitat across Central America and northern South America. Its see-through underside and dedicated male parental care set it apart within the broader glass frog family.
Camouflage on one side, transparency on the other
An emerald glass frog manages two completely different visual strategies at once, presenting solid green camouflage from above while remaining genuinely see-through from below, a combination shaped by the very different threats it faces from each direction.
Status
Least Concern — present across much of its Central and South American rainforest range, though sensitive to stream habitat degradation.
Emerald Glass Frog: common questions
Can you really see through an emerald glass frog's skin?
Yes, an emerald glass frog has skin along its underside translucent enough that its beating heart, digestive tract, and other internal organs can often be seen directly through the belly, a striking transparency shared across the broader glass frog family and directly responsible for the group's common name.
How does a male emerald glass frog protect its eggs?
A male emerald glass frog typically guards a clutch of eggs laid on the underside of a leaf overhanging a stream, remaining nearby to protect the eggs from predators and parasites until the tadpoles hatch and drop directly into the water below, a dedicated parental care strategy shared by several glass frog species.
Why is the emerald glass frog green on top but see-through underneath?
An emerald glass frog displays a vivid, uniform emerald-green colouration across its upper body that camouflages it effectively against leaves when viewed from above, while its translucent underside serves a different function, potentially helping it blend into dappled light and shadow when viewed from below against the forest canopy.
Where does the emerald glass frog live?
The emerald glass frog is native to rainforest habitat across parts of Central America and northern South America, generally found along fast-flowing forest streams where males call from overhanging vegetation and guard eggs laid on leaves above the water.