Marsh Haunt
this unusual swamp creature was native to the planet Abraxin, although it could be found in many forms on other planets. Many xenoarchaeologists believed that the idea of a "Force Demon" evolved from beings who encountered a marsh haunt on a dark night. The marsh haunt was a greenish-gray, bipedal creature whose skull was set between its shoulders, giving it a headless appearance. They were unintelligent creatures which were more fearsome in appearance than they were in action, but they had the ability to channel a small amount of the Force to frighten other creatures. By hunting in packs, marsh haunts could scare their prey into an ambush of other marsh haunts.