Pangolins are the 'world's most trafficked mammal.' This man wants to save them

(CNN)Pangolins -- four-legged mammals with sloth-like claws, anteater-like snouts, and armour of diamond-shaped scales -- are thought to be the most trafficked mammal in the world. Some species are on the brink of extinction.

They are elusive and solitary animals and population studies have not been able to estimate how many pangolins are left in the wild. They are also extreme