A large bison blocks traffic as tourists take photos in August 2016 of the animals in the Lamar Valley of Yellowstone National Park in Wyoming.
A large bison blocks traffic as tourists take photos in August 2016 of the animals in the Lamar Valley of Yellowstone National Park in Wyoming. Matthew Brown Associated Press
A large bison blocks traffic as tourists take photos in August 2016 of the animals in the Lamar Valley of Yellowstone National Park in Wyoming. Matthew Brown Associated Press