Arunachal macaque (Macaca munzala).  Described as a new species in 2005, the relatively large brown primate with a short tail was a significant discovery as, at the time, it represented the first new monkey species identified anywhere in the world in over a century. It is stocky in build and has a darker face than other closely related species. It is the highest-dwelling macaque in the world, occurring between 1,600m and 3,500m about sea level.