Say Hello To Our New National Mammal: President Obama today signed the National Bison Legacy Act making the American Bison the national mammal of the United States, according to the U.S. Department of the Interior.  Wyoming is home to the largest free-roaming herd of bison in the world, at Yellowstone National park.  Photo by Jennifer Michaud  of a bison at the Grand Prismatic Spring. #county10 #springcity #news