On the 4th day, we headed off to Gibbon Wildlife Sanctuary mainly to see the Hoolock Gibbon. We left early in the morning at about 4am to reach Gibbon. The drive was quite beautiful with open fields and small towns all along the way. Just outside the sanctuary, we saw this troop of langurs playing around. They were the Capped Langurs. Even though our driver said that we would get more sightings of this, we insisted that we stop there for a while. We spent quite some time observing and photographing them. They were just feeding on various things in the tree.