The wild boar (Sus scrofa), also known as the wild swine or Eurasian wild pig is a suid native to much of Eurasia, North Africa and the Greater Sunda Islands. Human intervention has spread its range further, thus making the species one of the widest ranging mammals in the world, as well as the most widely spread suiform. Its wide range, high numbers and adaptability mean that it is classed as least concern by the IUCN. The animal probably originated in South-East Asia during the Early Pleistocene, and outcompeted other suid species as it spread throughout the Old World. As of 2005, up to 16 subspecies are recognised, which are divided into four regional groupings based on skull height and lacrimal bone length. The species lives in matriarchal societies consisting of young males, intrarelated females and their young. Fully grown males are usually solitary outside of the breeding season. The grey wolf is the wild boar’s main predator throughout most of its range except in the Far East, where it is replaced by the tiger. It has a long history of association with humans, having been the ancestor of most domestic pig breeds and a big game animal for millennia.