Winter counts (Lakota: waníyetu wówapi or waníyetu iyáwapi) are pictorial calendars or histories in which tribal records and events were recorded by Native Americans in North America. The Blackfeet, Mandan, Kiowa, Lakota, and other Plains tribes used winter counts extensively. There are approximately one hundred winter counts in existence, many of which are duplicates.
- ^ "Pictures of Indians in the United States." The National Archives. (retrieved 4 Feb 2010)