This thesis is concerned with studying aspects of the ecology of feral pigs in the wet-dry tropics of the Northern Territory. The data are needed for use in the management of feral pigs to reduce their agricultural and potential epidemiological impact. Particular emphasis is placed on collecting data needed for modelling foot-and-mouth disease in feral pigs, estimating agricultural damage caused by pigs and evaluating control techniques. All fieldwork was conducted in the Douglas Daly district of the Northern Territory.