An extraordinary and beautiful film shows the hazardous existence of a caterpillar Thaumetopoea Pityocampa. Sometimes joyful, sometimes pitiful and seemingly innocuous,' the Pine Processionary, as it is more familiarly called, is a wonderful subject... (more) for the French film director Robert Enrico ; but the wake of destruction it leaves behind in its struggle for survival has forced French biologists to declare war on the species.