FYI that whole thing about lemmings jumping off cliffs was staged by the film crew, for a Disney film of all things. >The myth of mass lemming suicide began when the Walt Disney movie, Wild Wilderness was released in 1958. It was filmed in Alberta, Canada, far from the sea and not a native home to lemmings. So the filmmakers imported lemmings, by buying them from Inuit children. The migration sequence was filmed by placing the lemmings on a spinning turntable that was covered with snow, and then shooting it from many different angles. The cliff-death-plunge sequence was done by herding the lemmings over a small cliff into a river. It's easy to understand why the filmmakers did this - wild animals are notoriously uncooperative, and a migration-of-doom followed by a cliff-of-death sequence is far more dramatic to show than the lemmings' self-implemented population-density management plan.