YELLOWSTONE NATIONAL PARK, USA - JULY 21: Male bison blocking road on July 21, 2005 in Yellowstone National Park, Wyoming, USA. The Yellowstone Park bison herd is the largest public herd of American bison in USA Stickers #220874096
YELLOWSTONE NATIONAL PARK, USA - JULY 21: Male bison blocking road on July 21, 2005 in Yellowstone National Park, Wyoming, USA. The Yellowstone Park bison herd is the largest public herd of American bison in USA Poster #220874096
