McGraw-Hill Films film guide 101993-6 'The Riddle of the Rook', Bahavior and Survival series, 25 minutes/ color/ LC#73-700428, Produced by Windrose-Dumont-Time, Recommended for use in Biology, Environmental Science, Animal Behavior Studies in high Schools, Colleges...or for General interest Groups. Adviser: Professor Niko Tinbergen FRS University of Oxford.