When I read the article in the National Geographic website I was surprised to learn that a frog can be carnivorous. The horned frog has sharp teeths and eats anything that will fit into his mouth: "They are aggressively territorial and voracious to fault. Some have been found dead in the wild with the remains of an impossible-to-ingest victim still protruding from their mouths," the article says. Click on the picture if you would like to know more about this interesting creature.