Red-shanked Douc Langur (Pygathrix nemaeus), we them at Monkey Mountain aka Son Tra, a nature reserve in Da Nang and a few in Bach Ma National Park.
Came across bachelor's male groups and family groups with juveniles and even newly born langur (third pic).
They are critically endangered and Son Tra is one of the last refuge for the Red-shanked Douc Langur. Like other langurs, is primarily a folivore, leaf-eater feeding on young leaves and buds. Occasionally eating flowers, fruits and seeds.










