In behavior never before recorded by scientists, male red-eyed tree frogs are shown shaking their rumps and entire bodies to show dominance. The shaking often precedes wrestling between the two males.

What prompts the embryos of certain frogs to hatch early if shaken by a hungry reptile but not if buffeted by an outside force such as rain? According to biologist Karen Warkentin, it's a ...

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 by ...