In addition to the ibex, that iteration of what is currently Lemur Island also hosted, for one summer in the 80's, a temporary "exhibit" showing koala and a wombat (this during the period when koalas were absent from non-California zoos and wombats were far more rare). I use quotation marks around the word exhibit because no effort was made to house these species - the wombat was released on the mock rock of the ibex exhibit, and a lone "tree" was erected in the center for the koala. Not a great first sighting of koala for me.Lemur Lookout opened in the early 60's for baboons. Based on photos from back then, I'm guessing the structure survived and it looks identical to what it is today. Sometime 25-30 years later they were replaced by Ibexes until the turn of the century when Lemur Lookout was created.