Poor weather prompts USNPS to cut short initial phase of wolf replenishment at Isle Royale NP

A wet, cold preview of winter has brought an end to this year's wolf recovery efforts at Isle Royale National Park, where four wolves have been relocated this fall.

Though the original goal called for two additional wolves from Michigan to be relocated to the island park in Lake Superior this year, cold weather, extensive rain, and snow showers made it necessary to end trapping efforts. 

https://www.nationalparkstraveler.org/2018/10/wet-wintry-weather-ends-falls-isle-royale-national-park-wolf-recovery-effort