FILE - This Sept. 26, 2018 file photo provided by the National Park Service shows NPS staff unloading a crated gray wolf from a United States Fish & Wildlife Service aircraft at Isle Royale ...

1Moose on Isle Royale have be come so numerous they are damaging the forest. The last time that happened their numbers crashed as moose starved and succumbed to harsh winters.

A last-minute medical issue grounded researchers' annual wolf-moose survey on Isle Royale this past winter, marking yet another year that scientists have run into problems trying to count the ...

Researchers from Michigan Tech University were unable to conduct their annual wolf-moose survey on Isle Royale this past winter. A last-minute medical issue grounded their ski-plane pilot, and no ...

Researchers from Michigan Tech University were unable to conduct their annual wolf-moose survey on Isle Royale this past winter. A last-minute medical issue grounded their ski-plane pilot, and no ...

Isle Royale is a 134,000-acre (54,200-hectare) island in far western Lake Superior between Grand Marais, Minnesota, and Thunder Bay, Canada.

Researchers from Michigan Tech University were unable to conduct their annual wolf-moose survey on Isle Royale this past winter. A last-minute medical issue grounded their ski-plane pilot, and no ...