They usually don't eat anything at all. They can sometimes eat bad stuff but the real question is 'who eats it?' They can eat insects bugs and mites but they are not found eating. Corroboree frogs can eat a whole chicken and a whole snake even though it is only 25mm long but they are an incredible species that is why it is so sad that they are endangered. They are endangered because of the global warming and humans hunt them. Corroboree frogs eat lots but also nothing at all. You need to work it out? Well so do I!