The red tree frog (Litoria rubella) was thought to be a single species with the largest distribution of any Australian frog—spanning 4.6 million square kilometers, from the monsoon tropics to ...

Of all vertebrates, gray foam-nest tree frogs exhibit the most extreme form ... and synchronously beat their back legs to help make a big wonderful nest,” where they deposit their sperm.

The guttural call of a howler monkey. The rhythmic clucking of a macaw. The throaty burps of a tree frog. It sounds like the ...

Beelzebufo ampinga, the so-called "devil frog," may be the largest frog that ever lived. These beach-ball-size amphibians, now extinct, grew to 16 inches (41 centimeters) in length and weighed ...