The U.S. Postal Service dedicated the American Bison Forever stamp at the 2026 Boston World Exposition, honoring the national mammal.
- The stamp features a modern photograph of a Yellowstone bison blended with the classic 1923 American Buffalo stamp design. - Art director Greg Breeding adapted the vintage artwork to create a "stamp within a stamp" effect with continuous prairie grass.
- Speakers included Lisa Bobb-Semple, Maureen Murray, and James Weigant, highlighting conservation and Native American heritage. - The Forever stamp is always equal to the current First-Class Mail one-ounce rate.