 In 1981, for the Hogle Zoo's fiftieth anniversary, the Animal Giants Complex was built.The exhibit was built to house the zoo's elephants, Dari, Kali, Twiggy, Toni, and Toka, and the zoo's white rhinos, Princess and George.Naturalistic outdoor enclosures were not only built for the zoo's pachyderms but for ostriches and tortoises too.