The legend of the White Buffalo
Sioux mythology has a female character of supernatural origin referred to as the White Buffalo Calf Woman.
According to legend, two men were sent out by their starving and demoralized villages to look for buffalo herds near the Sacred Hills, also know as the Black Hills, in western South Dakota.
They had a vision of a maiden dressed in white buckskin, who told them to prepare the villages for her arrival. She appeared soon after and brought prayers, teachings, a sacred pipe and other offerings.
She promised to return someday to renew the people's faith and spirit, and as she departed, she turned into a buffalo calf. She rolled over repeatedly, changing from black to brown to yellow to white. Ever since, the white buffalo has been viewed as a return of the maiden and her promise of renewal.
From WhiteWolfPack Blog