Toyota Elephant Passage is a $50 million exhibit. At its opening, it was the largest bull elephant habitat in the world, designed to house up to 12 elephants, 8 of them bulls. This arrangement allows the zoo to conduct behavioral research related to the recent discovery that bull elephants (originally thought to be solitary) form loose bachelor herds in the wild when not breeding with matriarchal herds. The exhibit houses Asian elephants and other animals such as greater one-horned rhinoceros (also known as Indian rhinoceros) and Malayan tapirs, which rotate among different habitats in the same style as Predator Ridge. It includes more than of trails for the animals, and pools in the exhibit contain a total of . Northern white-cheeked gibbons swing directly over a boardwalk for visitors, traveling between three islands. Clouded leopards and sarus cranes live in nearby yards. The exhibit includes an indoor facility for smaller species like fishing cats, Asian small-clawed otters, great hornbills and green tree pythons and it provides important breeding facilities for the Indian rhino and Asian elephant in North America.