Sam Rosenfeld observed various primates at the zoo over five parts. In Part I, a prehensile tail was observed. In Part II, orangutans were seen grooming each other. In Part III, a male Red Uakari showed teeth and grunted at the observer playing with its female partner, while a female Red Uakari was taught to pet nicely but seemed confused the observer had no critters on them. In Part IV, humans were observed as both curious and jealous from a captive primate's perspective. In Part V, it was difficult to get quality pictures as the primates were excited by the male observer's presence and uncomfortable being smiled at or stared at with the observer in