Elephants have always been very popular animals both to "zoo geeks" and the general public alike. Of course, there's other popular animals also like lions and tigers and bears (but none of those come from both Asia and Africa, except for Asian lions which are not kept in large numbers by zoos and are def thought of primarily as an African animal). Even the major primates (like organutans, gorillas, chimpanzess) differentiate between contients. Other animals besides elephants such as rhinos and leopards don't seem to be as popular as elephants, popular though they may be. So if a zoo wanted to highlight both its African and its Asian animals, wanted to arrange its zoo aras on a geographical basis and could only afford, or had the space for either African or Asian elephants which other animals from Africa or Asia do you think are more popular and could more interest the public? Or to put it another way which section of the park Africa or Asia most needs elephants to help sell that section of the zoo? I might note in America's Best Zoos only Disney's Animal Kingdom made both the Africa and Asia Top 10 list and I do wonder if it wasn't other things like th Kilimanjaro Safari ride that made it possible (they do describe that as the one "must do.") Oh, one final point since it's an very expensive and so few zoos have them you can't include Giant Pandas to help sell the Asian section.