Earning an M.S. from Montana State University, he studied the mountain goats colonizing Yellowstone. Studying the wolf and elk predator-prey dynamic, he earned a Ph.D. from the University of Alberta.
As a professional guide, he specializes in the natural and cultural history of the park, wildlife observation, and wilderness travel. With his wife Linda, he owns and operates Yellowstone Wolf Tracker (www.wolftracker.com).
For the buffalo, he has battled for over two decades to bring sanity to the process that results in the travesty known as Yellowstone bison management. His defining purpose is to champion a land ethic that places the highest value on wildlife and habitat, and in so doing, forever protect the places that have provided his inspiration.