An unusual method of wildlife filmmaking. A family of rabbits are under threat from foxes, badgers, a shotgun wielding home-owner and the German Airforce.

The "Secrets of Life" series ran from 1934 to 1950

Gaumont British Instructional Films - Secrets of Life.
Released by General Film Distributors Ltd
Release Date: 1942
Film Title: Once We Were Four...
Director: Mary Field
Photography: Oliver Pike
Commentary: EVH Emmett