 In 2006, the wolf population, with the exception of 10 loners and separate pairs, formed three packs; the "east pack", the "middle pack", and the "Chippewa Harbor pack".Wolf packs on the island have been known to fight to try to extend their territory and, thus, supply of moose.In 2006, the east pack killed Chippewa Harbor pack's alpha male, as witnessed by John Vucetich, a professor at Michigan Technological University and one of the lead researchers on the island, who believed that the Chippewa Harbor pack may die off without their leader.