Glass frogs are named for their translucent skin, which helps display their internal organs from underneath (you can even watch their hearts beat). Although there are more than 150 different glass ...

If you find an old glass flower frog, should you buy it? Besides the price, turn it over: Does it have little knobs, bars or feet on the bottom? There should be three or five, depending on the frog’s ...

The see-through amphibians have an amazing strategy for hiding while asleep—one that could advance our understanding of blood clotting. The organs and developing eggs of a female glass frog, ...

Glass frogs do not live a life of modesty. With their semitransparent skin—green on the back, clear on the belly—the tree-dwelling, gummy-bear-size amphibians, which are native to the tropics of ...

Glass frogs are pretty remarkable creatures. Of the 150 species, many have transparent abdomens that give viewers a glimpse into their inner workings—guts, heart and all. Now, as Mindy Weisberger ...

These tiny Latin American tree dwellers are stellar fathers and masters at camouflage, recent research reveals. The eggs of a female sun glass frog (Hyalinobatrachium aureoguttatum) are visible ...