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FILE - In this Feb. 10, 2006 file photo released by Michigan Technological University, a pack of gray wolves is shown on Isle Royale National Park in northern Michigan. Scientists on Wednesday, April 30, 2014 say the slumping wolf population at Isle Royale National Park is leading to a boom in the number of moose on the Lake Superior island chain. The development reflects what researchers say are dim prospects for the wolves' long-term survival and raises the possibility that a runaway moose population will damage the island's vegetation. (AP Photo/Michigan Technological University, John Vucetich)

APNewsBreak: Isle Royale wolf decline boosts moose

Associated Press

In this 2013 photo provided by Rolf Peterson one of the few remaining gray wolves on Isle Royale, Isabelle, talkes refuge on an icy bluff over Lake Superior to lick her wounds after being attacked by other wolves. During this winter's prolonged deep freeze, Isabelle escaped from the island to the mainland across the frozen surface of of Lake Superior. Scientists said Tuesday, Feb. 25, 2014 that the five-year-old female gray wolf was found dead earlier this month along the shoreline on the Grand Portage Indian Reservation in northeastern Minnesota. (AP Photo/Courtesy Rolf Peterson)

APNewsBreak: Isle Royale wolf dies after escaping

By JOHN FLESHER - Associated Press

APNewsBreak: Isle Royale wolves may go extinct

By JOHN FLESHER - Associated Press