Revealing active behaviour that adds to our understanding of the nature of a species. Jaime Culebras (Spain) spots a hungry Spix’s horned treefrog feasting on a common big-headed frog. The tropical ...

The researchers also measured head width, snout length and eye position, finding clear links between these features and the types of prey consumed. Frogs with wider gapes could handle larger or ...

Most amphibians die when exposed to salt — except the crab-eating frog, which thrives with it. Here’s how it rewrote the physiology playbook.