More than 4,000 gray wolves in the western Great Lakes region are going back on the federal endangered species list, at least temporarily. The Fish and Wildlife Service said it had erred by ending federal protection for wolves in Michigan, Minnesota and Wisconsin without having a public comment period. Under a settlement with five activist groups, the agency said it would return Great Lakes wolves to the list while considering its next move. The wolves had been classified as endangered from 1974 until their removal on May 4. About 1,300 wolves in Montana and Idaho that also were dropped from the list in May are not part of the deal because a public comment period was held in their case.