It is possible to see a bit of action from him if you attend the zoo on one of the days where they are open late enough that it's dark. When it was daylight, he was curled up in a ball at the top. Later (maybe around 6:00 pm, in winter so it was dark) he was awake and moving around. The only reason I could see him easily, though, was because of the lights around the trees for the winter holidays.
