The most extensively documented cryptid in North America. Witnesses consistently describe a bipedal primate between seven and nine feet tall, covered in dark auburn or black hair, with a pronounced sagittal crest and an ammonia-like odor reported at close range.
The archive holds thousands of track castings, but physical evidence remains contested. Vocal phenomena attributed to the creature — wood knocks, low-frequency whoops, and the 1970s 'Sierra Sounds' recordings — remain unexplained by wildlife acoustics. Encounters overwhelmingly describe observation rather than aggression; the entity appears to actively avoid human contact.
Field protocol: report track finds with a scale reference before casting, and note any centerline stride over 40 inches.