The pangolin is the only mammal in the world that is entirely covered in scales. It has a peculiar gait, wobbling along on its hind legs. Its tongue is longer than its own body, and it uses it to slurp up insects. It doesn't have teeth so can't chew its food - instead, it is ground up by stones and keratinous spines inside their stomachs. Sadly, the Pangolin is endangered due to an illegal trade in its scales used in traditional Chinese medicines.