They prefer thick cover and need access to water, especially in hot conditions. In Western Australia they occur in large areas of the jarrah forest and adjacent farming areas of the south-west. They are also found in the coastal agricultural areas north of Perth and on the larger Kimberley river systems. Biology Most feral pigs live in groups, which typically consist of one or more adult sows and their litters. In Western Australia groups of more than a dozen pigs are rare, though much larger groups occur in eastern Australia where numbers are high.
Male pigs become increasingly solitary with age, and adult boars usually live alone.
Individuals or groups may forage over an area of several square kilometres, which always includes a water supply. Home ranges of different groups often overlap, so that many pigs may use the same area. Feral sows can breed during their first year, provided they are in good condition and have reached a body weight of at least 20 to 25 kg. Five or six young are usually born. One litter per year is normal, but with the gestation period of 114 days a second litter is possible if enough food is available for the sow.