Many scientists believe the red-eyed tree frog developed its vivid scarlet peepers ... These iconic rain-forest amphibians sleep by day stuck to leaf-bottoms with their eyes closed and body ...

They’ll be back out the next day and the night after, but in a different area of Haiku as they work to stop the spread of the coqui frog. But while the ear-splitting call of this tiny tree frog ...

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 ...

With this delightfully warm weather, the earth is coming alive. Buds are swelling, maples are flowering, and the birds have ...