text:  ABC's Jim Ryan. Hundreds gathered near a picturesque lake in Wyoming's Lamar River Valley, cheering as Chief Arval Lookinghorse spoke the name revealed on a painted hide that's been bestowed on a rare white buffalo born earlier this month in Yellowstone. The name? Wakangli, Lakota, for return sacred, the moment marking the highlight of a native religious ceremony commemorating the birth. The bison calf's birth fulfilled a sacred prophecy and was a message to take better care of the planet. I'm Richard Cantu.