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 ...

Brazilian backland casque-headed tree frogs are “slender,” reaching just over 2 inches in length, the study said. Their skulls have “small” bony protrusions, referred to as casques.

A beloved symbol of biodiversity, the red-eyed tree frog, shown here in Panama, has evolved a flexible strategy for survival. Christian Ziegler Karen Warkentin, wearing tall olive-green rubber ...