A wildlife biologist who studied mountain goats and grizzlies in the Rockies, Doug Chadwick began writing about natural history and conservation for national magazines. On assignments from Siberia to the Congo River’s headwaters, he has produced several hundred popular articles and ten books. He is also the lands committee chair on the board of Vital Ground, a nonprofit land trust that has helped safeguard more than 600,000 acres of wildlife habitat in Alaska, Canada, and the western US. He also serves on the board of the Liz Claiborne Art Ortenberg Foundation, which supports wildlife conservation programs around the world.

Joe Riis (b. 1984) is a National Geographic Photography Fellow and wildlife photojournalist whose work explores the migrations of animals in the Greater Yellowstone region of North America, highlights science and research expeditions, and connects people to some of the most remote and rare wild animals on the planet. He is a contributing photographer to National Geographic Magazine and Photography Fellow at the Wyoming Migration Initiative.

Trained as a field biologist, his decade long project “Yellowstone Migrations” has made him into a photojournalist, documenting in photographs for the first time the long distance migrations of the hooved animals in the Yellowstone region. That work started with a National Geographic Young Explorers Grant in 2007, which led to a LookBetween nomination in 2010, and a feature in the May 2016 edition of National Geographic Magazine on Yellowstone, the world’s first national park.

Riis completed his first feature for National Geographic Magazine at the age of 26 on the rarest bear in the world, the Gobi grizzly bear in Mongolia, prior to that he worked as a field assistant to photographers Steve Winter and Joel Sartore. In summer 2016, Riis’ photographs are featured alongside the work of contemporary artist James Prosek and ecologist Arthur Middleton in a new exhibition “Invisible Boundaries: Exploring Yellowstone’s Great Animal Migrations”, opening at the Buffalo Bill Center of the West in Cody, Wyoming and at the National Geographic Society in Washington, DC. Riis received the inaugural Camp Monaco Prize with ecologist Arthur Middleton from Prince Albert II of Monaco, the Stanford University Knight-Riser Award for western environmental journalism with writer Emilene Ostlind, and an Emmy Award for his work on pronghorn migration in the National Geographic Great Migrations series. His short films have toured in the Banff Mountain Film Festival and Telluride MountainFilm Festival, among others. Joe lives in rural South Dakota.