@Rohin That's an excellent question and it certainly appears that the Orangutans do have full access to several large trees. I don't see any signs of hotwire. If the trees are not wired, that makes the exhibit much better for the apes.
@snowleopard it would be even better if the trees were connected to some climbing structures to allow them to be arboreal near-continuously. This and enclosure 5 look to be some of the better orang enclosures in the zoo, although they aren't really anything good.
