It would be good if you could post the booklet on here for us to look at.I remember one brown bear, 3 tigers, a pair of Lions, two Giraffes, Sitatuga,Cape hunting dogs and lots of Macaws! I still have the zoo booklet. Also a young Chimp being walked around the pathways by the hand!
And it's also possible the young chimp you saw was Cassius! He would've been three at the time you visited.
