Here is an excerpt from a review that I posted on this site about a year or so ago:
The walk-through rainforest section opened to the public in 1983 and while it is very tiny in comparison to behemoths evident in modern zoos it is still of a high quality. There are 14 species present: two-toed sloth, hyacinth macaw, double yellow-headed Amazon parrot, blue-fronted Amazon parrot, scarlet ibis, Pacific parrotlet, blue morpho butterfly, plumed basilisk, red-footed tortoise, Hilaire’s side-necked turtle, tiger stingray, xingu river ray, royal panaque and red lip demonfish. The two macaws and other birds are very easy to locate, but attempting to find the 3 sloths and single basilisk is always an enjoyable challenge.