white bison
white buffalo

There are songs and tales of the white buffalo.

The white buffalo took this chance to push him through.

"Yeah, the white buffalo drops dead and the whole herd scatters!"

The story of PtesanWi is associated with the white buffalo.

Three top possibilities were the bison, hawk, and white buffalo.

The river was reportedly named for a white buffalo that had been seen on its banks.

Native Americans consider the appearance of a white buffalo a powerful omen.

The society was formed 10 years before a white buffalo was born.

Their herd includes fifteen white buffalo as of June 16, 2012:

The holy woman told the Lakota she would return in a time of great need, as a white buffalo.