Grass is a 1925 silent documentary film which follows a branch of the Bakhtiari tribe of Iran as they and their herds make their seasonal journey to better pastures. The film is Merian Cooper, Ernest Schoedsack, and Marguerite Harrison's documentation of their journey from Angora (modern-day Ankara, Turkey) to the Bakhtiari lands of western Iran, in what is now the Chahar Mahal va Bakhtiari province. The film highlights the extreme hardships faced by nomadic peoples, as well as the bravery and ingenuity of the Bakhtiari.