Floyd Red Crow Westerman, a U.S. aboriginal activist, actor and folksinger who appeared in the movie Dances with Wolves and performed with Willie Nelson and other musicians, has died. He was 71.

Westerman died Thursday at Cedars-Sinai Medical Center in Los Angeles of complications from leukemia, his son, Richard Tall Bear Westerman, said late Friday.

'He was a survivor of everything that the government has tried to do to Native Americans.'—Richard Tall Bear Westerman, son

The entertainer appeared in dozens of movies and television shows, including in recurring roles as Uncle Ray Firewalker on
Walker, Texas Ranger and George Littlefox on Dharma & Greg.

His most memorable movie role was in Kevin Costner's 1990
Oscar-winning Western epic, Dances with Wolves. He played the Sioux leader Ten Bears, who befriends Costner's character.

A respected musician, Westerman worked with Nelson, Bonnie Raitt, Harry Belafonte, Jackson Browne and others. His debut album, released in 1970, was titled Custer Died For Your Sins. Last year he released A Tribute to Johnny Cash to positive reviews.

"He always said he was a musician first and he just acted for the money," his son said Friday.

Westerman completed work in September on the upcoming Costner film Swing Vote.

He was an activist for environmental causes and for the rights of Native Americans and other indigenous people. In the 1990s, Westerman toured the world with Sting to raise money to preserve rain forests.

"He was really, really politically conscious," his son said.

"He said the Iraq war is just another land grab, like they did with Oklahoma and the Midwest in America. Back then it was about land and gold, and now it was about oil."

Not allowed to speak language

Westerman was born Aug. 17, 1936, on the Sisseton-Wahpeton Dakota Sioux reservation in South Dakota.

He left the reservation as a youngster to attend a government boarding school. In keeping with policies at the time, the school frowned on his culture.

"They cut his hair and they wouldn't allow him to speak the language," his son said. "He was a survivor of everything that the government has tried to do to Native Americans."

Westerman graduated from a reservation high school, spent two years in the Marines and earned a degree in secondary education from Northern State College in South Dakota.

He made his movie debut in 1989's Renegades, playing the father of Lou Diamond Phillips's character. He was a shaman in Oliver Stone's 1991 movie The Doors.

Survivors include his wife, Rosie, and daughters Jennifer, Chante, Nicky and Chenoa.