Deer in parts of northern Minnesota are experiencing something they haven't felt for a decade: a severe winter.
Bitter cold and heavy snow likely have resulted in increased whitetail mortality, wildlife officials say. And that likely will bring tighter deer hunting regulations in those areas next fall.
The hardest-hit area has been northeastern Minnesota, including Cook County, most of Lake County, northern St. Louis County and northern Koochiching County, said Mark Lenarz, a Department of Natural Resources wildlife researcher in Grand Rapids, Minn.
"We very likely will see deer mortality in those areas," he said.
Tom Rusch, DNR area wildlife manager at Tower, said workers there have found some dead deer this winter, and it's evident deer are hurting.
"We've found dead fawns primarily, but also some adult bucks and does, too. When you get a winter with dead adults, you know you're having more than an average winter."
Winter in the worst areas has been "moderately severe or severe," Lenarz said, based on the DNR's Winter Severity Index (WSI). The index gauges snow depth and temperature. Scores under 100 are mild; scores 100 to 180 are considered moderate, and anything over 180 is considered severe. The WSI at Tower was 170 last week; it peaked at 139 last year. Other WSI scores last week: Snowbank Lake west of Ely, 159; Isabella, 162; International Falls, 164; and Poplar Lake near Grand Marais, 169. The WSIs at all but Poplar Lake were considerably higher than in 2008.
"It's pretty clear this is the most severe winter in that part of state since the mid-1990s," Lenarz said. Said Rusch: "It's a long winter, and it isn't over yet."