We’ve all wished for the ability to disappear at one time or another. But for glass frogs, several species of tree frogs that call the tropical forests of Central and South America home, that dream is a reality … sort of. The bottle cap-sized body of the glass frog boasts a translucent belly and chest.
It’s a particularly helpful form of camouflage because it prevents predators from spotting the frog’s otherwise recognizable silhouette. Now new research, published in Science in December, reveals how the amphibians accomplish this trick: They shunt nearly all of their red blood cells straight to the liver.
