This video features a red-eyed tree frog (Agalychnis callidryas) resting on a moss-covered branch in the Costa Rican ...

Many scientists believe the red-eyed tree frog developed its vivid scarlet peepers to shock predators into at least briefly ...

Some harlequin frogs have lost their poison—and their ability to defend themselves. Scientists are on the case.

Fight or flight. They’re basic animal responses once considered purely instinctual—or perhaps strictly a natural learning process—but they may actually be a combination of the two. According to ...

Learn how the latest IUCN Red List update links deep-sea mining, diamond projects, and invasive predators to extinction risks ...

Congratulations, you’ve experienced iridescence – a dazzling optical phenomenon that can be seen in many kinds of wildlife.

As the camera shifts around the animal's body, there are flashes of blue iridescence that have likely evolved to startle or ...

Daddy longlegs, also called harvestmen, have been documented catching and consuming living frogs larger than themselves in ...