The wild boar (Sus scrofa), also known as the wild swine, Eurasian wild pig, or simply wild pig, is a suid native to much of Eurasia, North Africa, and the Greater Sunda Islands. Human intervention has spread its distribution further, making the species one of the widest-ranging mammals in the world, as well as the most widely spread suiform.
However, “pig” usually refers to the barnyard variety, a wild boar is the kind that lives out in nature and is the ancestor of domestic pigs, and “hog” is used to describe larger pigs and boars.