A long time ago the monster Ravanna abducted the princess Sita. As punishment for the fact that he helped the princess to escape, Hanuman was condemned to die on the stake. The clever monkey king could release himself in the very last minute, for his hands and face were already soot-blackened, as are all of his descendants. If an entellus looks at another one, there will be stress. They show trust to their friends by looking demonstratively at them.
Entellus langurs live in groups.
But about every two years the chief position is in danger.