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 ...

Scientists have discovered millions of animal species. Among them are some rare creatures with unique features and behaviours.

DESCRIPTION: Stockier than other leopard frogs, the Chiricahua looks like a small bullfrog with spots. The adult ranges in size from about two to five inches in length, and females are larger than ...