Why can some large frogs eat rodents reptiles and other frogs?

While most frogs are insectivores that feed on small invertebrates, some larger species have evolved to consume vertebrates such as rodents, reptiles, and other frogs.123

This carnivorous behavior is primarily a result of their physical size and capability. Larger species possess the strength required to overpower and consume these larger prey items. For instance, the African bullfrog is equipped with fanglike projections on its lower jaw and a fierce bite, allowing it to successfully hunt diverse prey. Similarly, the goliath frog and the North American bullfrog utilize their significant size to incorporate birds, mice, and small turtles into their diets.142

This dietary shift is an example of their adaptability, allowing these predators to exploit available food resources within their habitats beyond the typical insect-based diet of smaller frogs.13