How many are there in Australia?
A. Feral pigs occupy about 38% of mainland Australia and number anywhere between 3.5 million and 23.5 million. The wide variation is because it is very difficult to accurately estimate of the total number as their distribution and abundance can vary greatly due to changing environmental conditions from year to year. Their numbers drop dramatically during drought but can increase greatly in a run of good seasons. Feral pig densities in different habitats vary from about one pig per square kilometre in drier woodland and grazing land to 10 to 20 per square kilometre in wetlands and floodplains that are seasonally flooded.
