Norway rat records in Minnesota cluster around Agassiz, Tamarac, and Rice Lake national wildlife refuges in the northwest, likely tracing back to farmsteads and buildings near these otherwise wild sites rather than deep wetland or forest. NatureServe flags the species as exotic, not a native part of Minnesota’s fauna.
Reports peak sharply in November, a month when rats commonly move toward buildings and food stores as outdoor conditions turn cold. With 41 GBIF records against 28 from iNaturalist, much of the documentation likely comes from pest-control and trapping data rather than casual sightings of this widespread introduced species.
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