Comment 1 for bug 1196860

Furthermore, it seems that the correct name for the swamp critter is "Fel Boar", rather than "Warthog". In the official battle.net guide, the critter is called a Boar:

http://classic.battle.net/war2/units/mage.shtml

" Perhaps the most fearsome of the Mage spells, Polymorph alters the physical form of its target. This metamorphosis changes man to beast, forever warping both mind and body. This sorcery wholly transforms the victim into a creature of the wolds, thus losing their reasoning - making commands for direction or battle impossible.

This turns any living creature into the critter for that map type such as Pig for Wasteland, Seal for Snow, Sheep for Forest, Boar for Swamp. Although the unit hasn't been killed it has been in effect killed as it cannot be turned back into the previous unit or commanded in anyway."

And in Warcraft III, the Draenor boar is called a "Fel Boar".