This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Nimerigar (Shoshone)
The Nimerigar are a legendary race of little people found in the folklore of the Shoshone people of North America's Rocky Mountains. According to Shoshone tales, the Nimerigar were an aggressive people who would shoot poisoned arrows from tiny bows. Nimerigar roughly translated from Shoshone and Paiute languages means "people eaters".
They were believed to kill their own people with a blow to the head if they became too ill to be a participating member of their society. Although thought to be mythical, the reality of Nimerigar tales was called into question in 1932 with the discovery of the San Pedro Mountains Mummy, a 14 in tall mummy seated found in a cave 60 miles south of Casper, Wyoming.