Walkabout

Walkabout is a 1971 adventure survival film directed by Nicolas Roeg and starring Jenny Agutter, Luc Roeg, and David Gulpilil. Edward Bond wrote the screenplay, which is loosely based on the 1959 novel by James Vance Marshall. It centres on two white schoolchildren who are left to fend for themselves in the Australian Outback and who come across a teenage Aboriginal boy who helps them to survive.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.