Are you ready to test your vision? In this mind-bending optical illusion challenge the readers are asked to find a frog hiding in the leaves. The time limit for spotting the frog is 6 seconds.

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 ...

While poking around the garden the other day I found an adorable visitor, a small frog called a gray tree frog (Hyla versicolor) resting among the brightly colored flowers. This amazing little ...

Optical illusions are there to trick your brain into second-guessing itself. Look closer at the leaves. Maybe the frog is disguising colors or hiding behind some of the branches. If you spotted ...

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 ...

These frogs are the wood frog, pictured above; the spring peeper; the gray tree frog; and the similar Copes gray tree frog.

However, researchers found 23 other species to be at a higher risk of extinction than previously thought. This includes the Rio Cosnipata robber frog (Pristimantis cosnipatae), a Peruvian species that ...

While poking around the garden the other day I found an adorable visitor. A small frog called a gray tree frog (Hyla versicolor) resting among the brightly colored flowers. This amazing little ...