Serpentine, with a head at each end, the Amphisbaena can grow very large. However, and perhaps thankfully, they typically are encountered small, no longer than ten to fifteen feet. Food ingested at one end results in a dried pellet expelled at the other of what could not be digested. The creature seems to have two parallel digestive tracts, such that food can be ingested and subsequently expelled by both heads in tandem. Heads seem to be individuals, but are linked in such a way that one head knows all the same things that the other knows, but perceive sensory input separately. Singular tube shaped heart is located in the center of the animal- severance there will kill the beasts instantly. Anywhere off the center by around a foot or so will result in only one head perishing immediately, the other will continue to fight until exsanguination after several minutes.
The flesh of the creature is leathery, like that of a toad, with bead like scales around the face. The heads are vaguely snake like, but more blunt. When contracted, the folds of its skin bunch up around the necks (the creature's phallic appearance in this state gives rise to the common nickname, mud pecker). Moment for the creature seems erratic, particularly when the heads are at odds about which direction to travel in. Those who study amphisbaena claim that usually, one of the heads will dominate the other, taking control of movement more frequently.
Amphisbaenae are occasionally found in circus performances. It is well known that, if taken at a young age, the worm can be tamed (to a degree) and trained using a girdle around the midsection. Tightening this girdle quells aggression by slowing the heart-rate of the creature substantially.
