Pangolins feed solely on ants and termites. They have several adaptations, such as having no teeth, which help them in this regard. Like other ant-eating mammals, they have sticky tongues up to 25cm long for collecting their prey, and strong claws to tear open termite nests. Unlike any other mammals, however, pangolins have scales rather than hairs, giving them a reptilian appearance. When a pangolin is threatened, it rolls up into a tight ball, protecting its soft underparts and presenting a formidable, scaly barrier to predators. The ground pangolin has declined in numbers because, like its Asian cousins, it is in demand for its scales, which are used in local medicines.