Pangolin (Pholidota)

A pangolin is a solitary and nocturnal animal covered by an armor of scales. It hides under its scaly armor when confronted by a predator. It rolls into a ball and uses its sharp scales and tail to attack whenever it is touched. Pangolin's scales are made of keratin. 

It has a small head and a long tail. Despite its lack of external ears, the pangolin has excellent hearing. It also has no teeth and grinds food with its gizzard-like intestines. To aid its digestion, it consumes small stones and sand. These unique features make it one of the most trafficked mammals in the world.