Author Jeffrey Holden gives an in-depth look at how citizen researchers help scientists track wolf and moose populations on Isle Royale in his new book.

Since the early 1900s, an uninhabited island in Lake Superior has been the stage for a dramatic battle between moose and wolves—closely studied since 1953 in one of America’s longest-running wildlife ...

Michigan Tech biologist makes mark on Isle Royale wildlife Rolf Peterson, who lives in the Upper Peninsula, has helped to demystify a species that is frequently misunderstood.

Rolf Peterson, a retired Michigan Tech professor, became one of the leading experts on wolves during 55 years of studying wildlife on Isle Royale.

Peterson speculated the Colorado-killed wolf may have left the Great Lakes region in search of a mate, and just headed in a bad direction for it.

Using gray wolves in the American West as a case study, new research shows scientists often fail to recognize the “shifting ecological baseline” regarding apex predators in their work.

Nearby, walking up to Rolf and Candy Peterson ’s research cabin, I spot Rolf patching up holes in a handcrafted wooden canoe.

Even though relatively few moose calves appear to be surviving to adulthood, there’s no reason to worry about the moose’s immediate future, Michigan Tech biologist Rolf Peterson said.

Michigan Technological University’s annual Isle Royale Winter Study found the island’s wolf population stable, while the moose population is experiencing a dramatic decline.

Even though relatively few moose calves appear to be surviving to adulthood, there’s no reason to worry about the moose’s immediate future, Michigan Tech biologist Rolf Peterson said.