Here is an interesting inside look at the ad campaign for the LA Zoo's ROTA covering how it was put together and why: http://www.nytimes.com/2014/07/07/business/media/Ads-for-LA-Zoo-Rainforest-Exhibit.html?_r=0
Does it explain why the signs about it at the zoo use pictures of North American River Otters as opposed to Giant River Otters?