Like a ninja in the dead of the night, the glass frog was in stealth mode.  “GLASSY! I thought I might never find you. I have been searching for you for quite a long time,” Silvery’s voice cut through ...

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 ...

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 ...

Hundreds of endangered Australian Green and Golden Bell found a cozy and toasty place to huddle up. Unbeknownst to them, this ...

The organs and developing eggs of a female glass frog, Hyalinobatrachium mashpi, are seen in a photo taken on glass. Native to forests of Central and South America, glass frogs in the family ...

The northern glass frog, which ranges from southern Mexico to Ecuador, even conceals its blood to render its body more ...

Amphibians like glass frogs become see-through whilst sleeping - and now scientists have discovered how. The creatures hide 90 per cent of their red blood cells in their liver, which is mirror ...

The eggs of a female sun glass frog (Hyalinobatrachium aureoguttatum) are visible through her stomach. This image was taken in a mobile studio. On a moonless summer night in Ecuador’s Andean ...

As tiny glass frogs fall asleep for the day, they take almost 90 percent of their red blood cells out of circulation. The colorful cells cram into hideaway pockets inside the frog liver ...

Dec. 23 (UPI) --Researchers say they have solved the mystery of how glass frogs become mostly transparent while they sleep. The discovery may lead to innovations in how to understand blood clotting.

But when northern glass frogs wake up and hop around in search of insects and mates, they take on an opaque reddish-brown color. "When they're transparent, it's for their safety," said Junjie Yao ...