Inaugurated in August 1928, the Detroit Zoological Society operates both the Detroit Zoo and the Belle Isle Nature Zoo. It is responsible for the care and feeding of more than 3300 animals representing 280 species that are kept on a land area of about 51 hectares of naturalistic exhibits. They have a very varied collection of animals that goes from reptiles such as snakes to big land animals such as black rhinoceros or giraffes, going on through grey seals, polar bears or kangaroos. Jim Jim, Maximo and Mesou were the first gorillas to arrive to Detroit Zoological Society, in May and July 1955 from Congo, and although the zoo kept a few females on its long keeping gorillas history, they never got to breed.
Gorillas at Detroit Zoo are kept on a complex called The Great Apes of Harambee, a four-acre habitat which houses chimpanzees, drills and gorillas.
Detroit Zoo keeps a bachelor group of three adult gorillas: