Always With The Questions!

One question that I have about the Douc Langur is, What does it actually look like close up? And how does it act when its active in the zoo? This is my question because while I was at the zoo, the Doucs weren't active, and all they did was rest. Also, I wasn't able to see them close up, because they were hiding far away from my view, and the lighting was dark around that area. I would really like to see it close up, and during its active feeding time next time.

If I could find out more things about them regardless of time, money and effort, I would really like to be able to get close to them and observe them clearly, how they grow and how they act with real field work observation.