Never Cry Wolf is a 1983 American drama film directed by Carroll Ballard. The film is an adaptation of Farley Mowat's 1963 "subjective non-fiction" book. The film stars Charles Martin Smith as a government biologist sent into the wilderness to study the caribou population, whose decline is believed to be caused by wolves, even though no one has seen a wolf kill a caribou. The film also features Brian Dennehy and Zachary Ittimangnaq.
https://en.wikipedia.org/wiki/Never_Cry_Wolf_(film)
Just watched it, thanks for sharing! Taken as fiction it is a really great film.