I think that there are exactly 30 species of primates in "Primate Panorama" (including aye-aye), which must place the Denver Zoo close to the top of the pile in North American zoos. I think that this set of habitats ranks up there with "Predator Ridge" as the best part of the zoo.
There are a couple smaller trees in their exhibit that the younger ones seem to enjoy killing but really the rest of them are fake or large cut tree branches. I think there is 1.3.0 + four young. Watching these primates is very fun. I usually get very engrossed in watching the dynamics of this very delicate group. The male Hank, was abused at a roadside zoo for most of his life until Denver Zoo became aware, and took him under their wing. I'm not sure about the females, though I think one of them was with Hank when they were adopted. Hank is now very protective of his exhibit. Loads of people will make fun of him which made him mark his territory on people, show teeth, stomp on glass, and one time he even hurt another member of his family. Denver Zoo put him on medications to relieve stress and cover up the window viewing area. It looks like now he is a lot more mellow.