Glass frog photographed during sleep and while active, showing the differences in red blood cells within the circulatory system. Jesse Delia via AMNH When a tiny glass frog dozes off to sleep, its ...

Meet Nymphargus dajomesae, a member of the glass frog family and a resident of one of the last amphibian paradises on Earth.

Camouflage takes many forms in the natural world. Some animals are born with skin or coats that blend in naturally with their environment. Some Old World lizards like the chameleon have an almost ...

Now you see them, now you don't. Some frogs found in South and Central America have the rare ability to turn on and off their nearly transparent appearance, researchers report Thursday in the journal ...

Now you see them, now you don’t. Some frogs found in South and Central America have the rare ability to turn on and off their nearly transparent appearance, researchers report Thursday in the journal ...

After years of diligent work in the forests of Colombia and museums overseas, there is officially a new member in the family of frogs called the Centrolenidae, more commonly known as Glass Frogs.