The Wisconsin Department of Natural Resources says more data must be collected over the next few years to confirm the appearance that the state’s wolf population is stabilizing. Volunteer trackers put the winter wolf count at between 900-and-950 animals. The official goal is 350. The U-S Fish and Wildlife Service says the data it is collecting could result in a formal proposal to remove wolves from the list of endangered species. They were removed once before — in 2011 — but a federal judge reversed that three years later.