The study, extending over two summers a and one uni­versity year, was an endeavour 1) to determine the existence and nature of an innate activity pattern in porcupines under laboratory conditions, 2) to determine the behaviour of por­cupines in their natural habitat, 3) to compare field and laboratory data on the behaviour of the porcupine and 4) to determine the home range of the porcupine. / Thesis / Master of Science (MS)