UPDATE January 26: I found that the Billings Gazette published this story January 8. It is much more complete. See it here: Buck floatsdown Yellowstone River on ice chunks By BRETT FRENCH of The Gazette Staff.
An unidentified photographer took these pictures in Miles City Montana where the Tongue River flows into the Yellowstone River. The buck made it to shore. The photographer saw him jump to safety when the ice jammed close to shore.