Factual errors: Diane did not try to convince Leakey to send her to Africa, nor did she volunteer to remove her appendix, quite the opposite: In 1966, Leakey contacted Fossey and urged her to study gorillas in the wild as an experiment. At first Fossey was reluctant citing her lack of experience, but eventually agreed upon further coercion. To test her enthusiasm Leakey asked Fossey to have her appendix removed in the pretense of health measures which she then did.
Factual errors: The scene in which Diane orchestrated the mock hanging of a poacher and another where she burned poachers' huts are fictitious.
Anachronisms: In the scenes where Dian drives from the town to the mountains in a land rover, the vehicle used is Series III Land Rover, which first went into production in 1972, in 1966 the Series II was the production Land Rover, and sported a wire grill, and inset headlights, as opposed to the III's plastic grill, and lights in wings, as in the film.