|Boreas, the boreal owl at The Raptor Center|
|Boreal owl occurrence map for winter in Minnesota|
|This is the color legend from the MOU page|
|Other species of owls in winter in Minnesota|
For the state of Minnesota, the Minnesota Ornithologists' Union website has a feature where you can look at the occurrence of bird species, by county, and by season.
This is the occurrence map for boreal owls.
Here are other species' occurrence maps for Minnesota in winter months.