Wanamingos are strange mutant animals that live mostly in underground Pre war Ruins. Despite the rumors of their extraterrestrial origin, they were actually created by West-Tek with FEV as weapons for waging war on other countries and escaped into the wastes.

Morphologically, wanamingos are bipedal lifeforms that bear almost no resemblance to any other form of terrestrial life. They possess a large central body with a sizable mouth full of razor-sharp teeth, and a pair of long, tentacle-like appendages that appear to be used for both grasping objects and to batter opponents in combat. The creature's large head lacks visible sensory organs, but it does not seem to require eyesight in order to discern the location of prey. The creatures are devastating in close combat, chewing at foes and lashing at them with their tentacles. Through a process not entirely understood, these attacks also induce radiation poisoning.

They hatch from eggs laid by a wanamingo queen, a large grey-colored wanamingo which others fearlessly protect. They aren't intelligent in the usual sense, but they do seem to have a hive-mind mentality. Wanamingos are Long-lived but unable to reproduce without a queen, because of this they are slowly dying out.