A new study from the Smithsonian Tropical Research Institute (STRI) shows that red-eyed treefrog embryos hatch early when exposed to high ammonia levels — an environmental cue that it’s too hot and ...

One would be hard-pressed to take a walk outside without hearing the sounds of calling animals. During the day, birds chatter back and forth, and as night falls, frogs and insects call to defend ...

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 ...

"Through a dissecting microscope you can actually see the blood circulating through the branches," explained Jessica Rogge, who conducted this study as an undergraduate at Boston University Disclaimer ...

Warkentin, Karen M. 2000. "Wasp Predation and Wasp-Induced Hatching of Red-Eyed Treefrog Eggs." Animal Behaviour, (4) 503–510.