The term 'detectable ones' can be solved by the word 'toads'. Toads are amphibians that belong to the family Bufonidae. They are characterized by their dry, leathery skin and short legs. Toads are found in many parts of the world and are known for their ability to survive in a variety of habitats. They are also known for their toxic skin secretions which can be used as a defense mechanism against predators. Toads are an important part of the food chain, providing food for many other animals.