Some creatures blend in by sticking out. Learn more about glass frogs and the special way they hide their blood.

The northern glass frog, which ranges from southern Mexico to Ecuador, even conceals its blood to render its body more translucent, hiding nearly 90 percent of its red blood cells inside its ...

Fascinating: How Transparent Glass Frogs Mate Rainy season is also mating season for the glass frogs of Panama. First, the female collects water from a leaf in order to hydrate the eggs inside her.

Many scientists believe the red-eyed tree frog developed its vivid scarlet peepers to shock predators into at least briefly questioning their meal choice. These iconic rain-forest amphibians sleep ...

Greenhouse frog discovered by UT Arlington team in the Marshall Islands threatens local ecosystems by displacing native ...

This story appears in the March 2017 issue of National Geographic magazine. These frogs put the “group” in “group sex”—and that helps them thrive. Of all vertebrates, gray foam-nest tree ...