Eastern gorilla
There are two recognised subspecies of eastern gorilla: the mountain gorilla ("Gorilla beringei beringei") of the volcanic slopes of Rwanda, Uganda and eastern Democratic Republic of Congo; and Grauer's gorilla or eastern lowland gorilla ("Gorilla beringei graueri") in eastern Democratic Republic of Congo.
Metro Richmond Zoo
The zoo has one of the largest collections of primates in the United States, with more than 200 individuals representing 30 species, such as Sulawesi macaque, Diana monkey, orangutan, cottontop tamarin, red-handed tamarin, black-handed spider monkey, lesser spot-nosed monkey, coppery titi, eastern black-and-white colobus, ring-tailed lemur, red ruffed lemur, and black-and-white ruffed lemur . The zoo has a Diana monkey breeding program.