Roadside Attractions ; HBO Documentary Films, BBC Films and UK Film Council presents a Red Box Films production in association with Passion Pictures ; directed by James Marsh ; produced by Simon Chinn
Georgia State University College of Arts and Sciences presents in cooperation with the San Diego Zoological Society ; a film by Duane M. Rumbaugh, Austin H. Riesen, Robert E. Lee
Omni Film Productions ; produced with the participation of Telefilm Canada in association with British Columbia Films ... [and others] ; produced by Christian Bruyere, Ian Herring
produced by Spectrum Field Productions LLC for Animal Planet ; executive producers, Guy Nickerson, Jim Rapsas ; director, Guy Nickerson ; producer, Sara Helman
a co-production of Thirteen/WNET New York and BBC ; Educational Broadcasting Corporation ; written and edited by Mark Fletcher ; series producer, Bill Murphy ; executive producer, Fred Kaufman
the Pennsylvania State University PCR Films in the Behavioral Sciences ; [presented by] the New York Zoological Society, the Pennsylvania State University, the National Science Foundation ; written by George B. Schaller ; produced by the Pennsylvania State University
director, Gillian Darling Kovanic ; narration written by Amanda McConnell and Bruce Martin ; produced by Tamarin Productions Inc. in association with the Discovery Channel, USA ... [and others]
a Hugo van Lawick production, in association with The Discovery Channel. Chimpanzees: return to the forest / Nature Awareness Films, in association with Evangelische Omroep
a co-production of Natural History New Zealand, NHK (Japan Broadcasting Corporation), Discovery Channel, & NDR Naturfilm Studio Hamburg & Fernseh Allianz ; directors, Jeremy Hogarth, Stephen Downes