Eastern gorilla
Grauer's gorillas and mountain gorillas were previously thought to be two of the three subspecies of one single species, the gorilla ("Gorilla gorilla"). However, genetic research has shown that the two eastern subspecies are far more closely related than the western subspecies: the western lowland gorilla ("G. gorilla gorilla"), which justified the separate classification. The two eastern subspecies are now classified as "G. beringei".
Bronx Zoo
Baboon Reserve, opened in 1990, is a two-acre recreation of the Ethiopian highlands which, at the time of its opening, was the largest primate exhibit in the United States. The exhibit's main features revolve around the zoo's troop of geladas such as artificial rocks and earthbanks, and displays about life in the highlands and the side-by-side evolution of humans and geladas. Visitors can watch the geladas from multiple viewpoints along with Nubian ibex and rock hyrax, all of which are mixed together in the hilly enclosure. An African village-styled café overlooks the exhibit. Baboon Reserve won the AZA Exhibit Award in 1991. In the fall of 2014, a male gelada was born at the zoo, the first in over 13 years.