March of the Penguins
Decades before wildlife films such as "March of the Penguins", Joan and Alan Root pioneered filming animal migrations without interference from human actors. Their movies were narrated by such distinguished actors as Orson Welles, David Niven, James Mason and Ian Holm. Their 1979 "Survival" documentary, "Mysterious Castles of Clay", was nominated for an Academy Award for Best Documentary.