The feral pig (from Latin fera, "a wild beast") is a pig (Sus scrofa) living in the wild, but which has descended from escaped domesticated individuals in both the old and new worlds. Razorback and wild hog are American colloquialisms, loosely applied to any type of feral domestic pig, wild boar or hybrid in North America; pure wild boar are sometimes called "Russian boar" or "Russian razorbacks". The term "razorback" has also appeared in Australia, to describe feral pigs there.
Eurasian wild boar, released or escaped into habitats where they are not native, such as in North America, are not generally considered feral, although they may interbreed with feral pigs.
Captain Hunter called the ones shown on this page, feral hogs, so that is how the two RV Gypsies will refer to the ones shown below.