an exhibit area that was known as Cascade Canyon, which had opened in 1973. Outback A new Australian Outback area, nicknamed "Koalafornia", opened in May 2013. The San Diego Zoo has the largest Koala colony outside of Australia. It has twice as much exhibit space for koalas, including more outdoor enclosures based on a realization that koalas need sun exposure for their health. The new area includes other Australian marsupials, such as brush-tailed bettongs, parma wallabies, as well as Australasian birds, such as kagus, laughing kookaburras, blue-faced honeyeaters, common emerald doves, fawn-breasted bowerbirds, metallic starlings, masked lapwings, Gouldian finches and palm cockatoos. Since October 2013, the exhibit also houses Tasmanian devils, the first American zoo to do so; the animals are now kept in half a dozen zoos in the Americas as part of the Australian government's Save the Tasmanian Devil Program. Africa Rocks Conrad Prebys's Africa Rocks highlights the biodiversity of Africa. The exhibit opened on July 1, 2017, but was not completed until December 6, 2017. The exhibit cost US$60 million to construct. The money was donated to the zoo by 3,800 donors. Africa Rocks replaced Dog and Cat Canyon, which featured grottos that were built in the 1930s. The exhibit features the following six habitats: Cape Fynbos The Cape Fynbos exhibit features African penguins, an endangered species native to South Africa. The exhibit was designed to mimic the giant granite boulders that are found on Boulders Beach in South Africa, a place where these birds live. The long and wide habitat also includes a pool for the penguins that stretches , with depths up to . Along with the large pool, the exhibit features a cobblestone beach and a nesting area. A group of 20 penguins moved in on June 22, 2017, to get ready for when the exhibit opened on July 1, 2017. The penguins also share their exhibit with leopard sharks and opaleyes. Twelve leopard sharks arrived at the San Diego Zoo on June 23, 2017, from SeaWorld San Diego. The sharks were introduced to their exhibit and their penguin neighbors on Wednesday, June 28, 2017. The sharks range in age from 5 to 20. African penguins do not live alongside leopard sharks in the wild; however, they do live with similar shark species. Leopard sharks feed on crustaceans on the bottom floor and do not pose a threat to the penguins. Acacia Woodland The