American Magpie - Black-billed Magpie, Bison, Colorado, Gratefulness, Nature Photography, Rocky Mountain Arsenal Natoinal Wildlife Refuge, Rocky Mountains, ThankfulnessGrateful and Thankful – Magpie and Bison November 3, 2018November 13, 2018 cmdnaturephotos Grateful for the day I saw a Magpie sitting on the back of a Bison.