So, let's return to Yellowstone! Any visitor to this magnificent national park is treated with awesome views of wildlife, including American Bison. These are the heaviest land animal in North America yet can travel at speeds up to 35 - 40 mph! That fact amazes me as bison are enormous and look as if they are best suited for resting! Nevertheless, I captured several photos of these beautiful creatures, including one adult who appeared to be scratching his back by rolling in the dirt and another of a cow and calf.