This video shows a close-up view of a colorful red-eyed tree frog resting on a moss-covered branch in the tropical rainforest of Costa Rica. The frog has bright green skin, striking red eyes, and ...

Five-day-old red-eyed treefrog embryos are tightly curled inside dehydrated eggs packed closely together. It’s dry enough to make them begin to hatch early amid heating. Karen M. Warkentin As the frog ...

Red-eyed tree frog hatchlings were dodging hungry snakes a long time before Warkentin started studying the phenomenon 20 years ago. “People had not thought of eggs as having the possibility to show ...