Joe Riis is a National Geographic contributing photographer and photography fellow at the Wyoming Migration Initiative. He has been working in the Greater Yellowstone since early 2008, focusing primarily on wildlife migration. From his experience on a personal passion project about the Grand Teton Pronghorn Migration, to several recent National Geographic assignments, Joe knows how to tell this story. While the Absaroka Range is one of the most rugged landscapes where Joe has worked, he is no stranger to challenging terrain, having photographed wildlife in regions as diverse as the Mongolian desert and the Mexican jungle. Joe’s work photographing the elk migrations and contributing to Elk River and Invisible Boundaries represent the culmination of 8 years working on these themes in the Greater Yellowstone.