Although there have been many purported encounters with Am Fear Liath Mòr, few eyewitnesses have seen the creature. Those who have describe it as an extremely tall figure covered with short hair, or as an unseen presence that causes uneasy feelings in people who climb the mountain. Other eyewitnesses describe it as a large humanoid standing over ten feet tall and having olive toned skin with long arms and broad shoulders. Evidence of the existence of this creature is limited to various sightings and a few photographs of unusual footprints. Due to its abnormal size compared to other ape-like beings, cryptozoologists have placed it under a separate group consisting of similar primates aptly named "True Giants", a term coined by cryptozoologist Mark A. Hall. It is traditionally seen as a supernatural being, but Am Fear Liath Mòr has been compared to the Yeti of the Himalaya and the Sasquatch or Bigfoot of North America. References to wild 'Greymen' in Scotland and similar creatures elsewhere in Europe, sometimes called Wudewas or 'Wood Men', date back to the 13th century, and are believed by some to represent relict hominids. In addition, nearly all reports of Am Fear Liath Mòr include the sound of footsteps crunching in the gravel just out of sight.