The tiny island of Umananda, in Assam’s Brahmaputra River, is famous for its Hindu temple patrolled by a troop of introduced golden langurs. Within moments of stepping off the boat, Dhyey captured an ...

One possible explanation is that young langurs in the troop observe and learn from adults. But that does not explain how or when the adults learned them. “This is a subject for future work,” Dasgupta ...

Purple-faced langurs (Semnopithecus vetulus ... said the subadult macaque appeared weaker and stayed near its troop, likely due to poor camouflage and increased vulnerability.

The golden langur lives only in Bhutan and adjacent Assam. It probably evolved in geographic isolation on the western side of the Manas river. On the other side of the river is its close cousin ...