The wolf pack on Isle Royale is growing

Isle Royale wolves prepare to attack a bull moose
In this photo provided by Michigan Tech University, the Chippewa Harbor wolf pack is seen preparing to attack a bull moose, which successfully fought off the wolves and survived, on Isle Royale on Jan. 25, 2008.
AP Photo/Michigan Tech University, John Vucetich

Visitors to Isle Royale National Park in Lake Superior are hearing and seeing signs of a litter of wolf pups.

That's good news for the island's struggling wolf population which is believed to number less than a dozen right now. Some researchers worried that inbreeding among the small number of wolves was making it harder to reproduce. No pups were born at all in 2012.

Paul Brown, Chief of Natural Resources at Isle Royale National Park discussed the new arrivals with Morning Edition host Cathy Wurzer.

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