Brandt. 2002. Summer and hunting season home ranges of wild boar (Sus scrofa) in two habitats in France. Game and Wildlife Science 19:281-301. Caley, P. 1993. The ecology and management of feral pigs ...

But N.C. Wildlife Biologist Falyn Owens says they’ve spread in the wild a lot more since the 1950s. "A big part of it is also the intentional transportation and release of pigs for hunting purposes.

Predation pressure and a "landscape of fear" created by crocodiles on feral pigs could also be limiting ... how many crocs there were before mass hunting, nor what exactly a "healthy" NT river ...