Argentine horned frogs rarely move, hiding on the forest floor, partially covered with leaves, waiting for potential meals to scurry by. Horned frogs have a voracious appetite and eat anything that can fit into their mouth, including snakes, mice, birds, and other frogs. Their bodies can be as wide as it is long, with their head and huge mouth almost as wide as their bodies. Because of their huge mouth, they are also called Pac-Man frogs.