Sorry members and viewers for the late response.
@ Shakti da, you are right. But it wears such orange colour coat from the month of September. this image was shot in late October. The temperature of this image little bit high and langurs are in shaded portion of forest hence they are looking such deep yellow/ orange.

@Sabyasachi da, Thanks for for your amazing observation. Yes they are the same isolated group.

@Mrudul ji, Thanks for your comments.

Samrat