The boar is a porcine beast noted for its belligerence. It may also be called a “sanglier” or, for the sake of a cant, a “grice”. As an heraldic charge, the boar dates from the earliest heraldry, as in the arms of Whichcote, c.1295 [ANA2 103].
The boar is depicted with a double set of tusks and a razor-back of bristles (its “crining”) down its spine. A “boar proper” is understood in the Society to be brown. The boar doesn’t seem to have a default posture; the illustration shows a boar passant.
Margaret of Rochester bears: Sable, three boars passant argent.
Otuell Gowe bears: Per fess azure and vert, two boars passant counter-passant Or.
Tadgg h-úa Faelan bears: Vairy sable and argent, a boar passant gules.