Ceratophrys ornata

From The Aquarium Wiki

These Argentinian frogs are highly predatory. They eat invertibrates, and other ceratures, including pinkies, as they grow larger. Horned frogs spends much of their time buried in the substrate of their vivarium. A thick layer of bark chips or similar sphagnum moss, which can be sprayed to increase then relative humidity. should also be avaliable.