Frogs rely on their vision and hearing to catch prey and avoid predators. They have good hearing and vision, although their ears and eyes aren't situated quite like those of most other animals. Frogs don't have external ears. Instead, they have an eardrum called the tympanum that sits just behind each eye.
Frogs' eyes also play an important role in eating. Frogs don't have the skull structure or the necessary muscles to chew their food. Instead, they have to swallow their prey in a couple of gulps. This is tricky since, unlike people, their tongues aren't usually anchored in the back of their mouths. That means a frog can't use its tongue to push food down its throat and toward its stomach. For this reason, when a frog swallows, its eyes sink down into its skull to help push the food along.
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