The langurs don't have any chance to use exhibts not visable to visitors-they are all the time on display. All langurs are very sensitive animals, they need rest and silence, otherwise they are to stressed, especially by the thounsds of screaming school childeren. All german zoos offers langurs opprtunities to use behind the scenes exhibits if they want, at any time, and if you go to Stuttgart for example,the langurs are in the midday mostly in their off show quartes instead of in the show exhibit.
Also the climbing opportunites are low in this exhibit.
