The first sound movie made entirely in Africa, Congorilla chronicles the Johnson’s 3rd trip between 1930 and 1931. Premiering in 1932, the movie permitted audiences to hear what they had only been able to see during the Johnson’s earlier work. In the movie Martin and Osa revisit familiar territory in Kenya and Tanzania before moving on to Uganda and the Congo basin. Along the way they film thousands of flamingoes at Lake Nakuru, migrating wildebeast and zebra in the Serengeti, and charging rhino in the Northern Frontier District. Filming from a small boat on the Nile in Uganda, the Johnsons and their film crew record exciting encounters with large crocodiles and hippos. The latter part of the film is devoted to the seven months they spent in the Ituri Forest with the Mbuti peoples. They capture village life despite the high humidity which caused batteries to deteriorate, wires and connections to corrode, and mildew to form on camera cases. The movie culminates with the capture of two young gorillas, a practice luckily no longer sanctioned, but standard procedure for populating zoos in the past.