lagoon with East African crowned cranes, pink-backed pelicans, Dalmatian pelicans, African sacred ibises and great white pelicans. The North Africa exhibit represents the Sahel and Sahara Desert that houses scimitar-horned oryx, Barbary stag, red-fronted gazelle, Barbary sheep and Ankole-Watusi cattle. The Southern Africa field exhibits Grévy's zebras, waterbucks, kudus and an Ankole-Watusi. The South Africa field exhibit holds Masai giraffes, common eland, sable antelope, gemsbok, springbok, blue wildebeest and ostrich. The Central Africa region features a wooded waterhole with an island for saddle-billed storks, spur-winged geese, Lappet-faced vultures, Goliath herons, Egyptian geese, and Rüppell's vultures. On the shores of the lake are bongo antelope, red river hog, greater kudu, Ugandan kob, roan antelope, and other forest animals. Species of note in the open enclosures include two subspecies of giraffe, rhinos (it was the last New World zoo to have northern white rhinoceros), vultures, markhor, and many species of antelope, gazelle, and deer. Tiger Trail The Sumatran tigers, Denver and Rakan (male), Joanne, Majel, Cathy, Debbie, and Diana, have three different exhibits, and there is a glass viewing window for visitors. After raising $19.6 million for the new exhibit ground was broken on December 12, 2012. The new exhibit is named the Tull Family Tiger Trail after movie producer Thomas Tull and his wife. Tiger Trail opened May 24, 2014. In August 2017, a Bengal tiger cub named Moka was rescued by border police from a car on the Mexican border and brought to the zoo. The exhibits' matriarch, Delta, was euthanized on July 29, 2018, shortly after her birthday, due to old age. The current matriarch is her daughter, Joanne. Nairobi Village and Gorilla Forest The park's Nairobi Village houses numerous exhibits for smaller animals. Among these are meerkats, Rodrigues fruit bats, an African aviary, ring-tailed lemurs, Chilean flamingos, pudú, Kirk's dik-diks, yellow-backed duikers, red river hogs, West African crowned cranes, South American coatis, and white-fronted bee-eaters. A large lagoon is home to numerous species of waterfowl, both foreign and native. Lorikeet Landing and Hidden Jungle display feedable lories and lorikeets, and African birds, respectively. There is a nursery where visitors can watch baby animals being hand-reared as well as a nearby petting corral. Finally, a habitat houses a troop of western lowland gorillas. In 2014, Imami gave birth to Joanne despite a respiratory problem. She and Joanne were treated for 11 days. In 2019 medical experts collaborated to do