Wisconsin mammals

North American Deermouse in Wisconsin

Peromyscus maniculatus

Native to Wisconsin S4 Apparently Secure in Wisconsin

Not listed as nonindigenous in Wisconsin by USGS NAS; native to its Wisconsin range.

IUCN Red List status

  1. LC
  2. NT
  3. VU
  4. EN
  5. CR
  6. EW
  7. EX

LC – Least Concern

Widespread and abundant; not at risk.

Deer Mouse (Peromyscus maniculatus) (9310532204)DiGangi-DeermousePeromyscus maniculatusDeer mouse peering out from a lichen-covered tree crook beside a green leafDeer mouse braced on a bark-stripped log, ears forward and alert
Photo: Seney Natural History Association · CC BY-SA 2.0Deer Mouse (Peromyscus maniculatus) (9310532204)Photo: 6th Happiness · CC BY-SA 3.0DiGangi-DeermousePhoto: (Picture courtesy of the CDC and the Partnership, Inc.) · CC BY 2.5Peromyscus maniculatusPhoto: USFWS Mountain-Prairie · CC BY-SA 4.0Deer mouse peering out from a lichen-covered tree crook beside a green leafPhoto: Gregory "Slobirdr" Smith · CC BY-SA 2.0Deer mouse braced on a bark-stripped log, ears forward and alert

North American Deermouse in Wisconsin, by the numbers

Common in Wisconsin 4th most recorded of 75 mammals logged in Wisconsin

6,141 occurrence records
53 with iNaturalist photos
Jan 4, 2026 Last seen in Wisconsin

Records from 2000–2026.

6,141 total records count every Wisconsin occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 300; the monthly chart covers the 6,140 records with a full observation date.

When to look for the North American Deermouse in Wisconsin

Most sightings fall in July to September.

6,140 Wisconsin occurrence records (iNaturalist and GBIF) by month of year, 2000–2026. Shows when the species is recorded, not a guarantee of presence.

Monthly Wisconsin records (table)
MonthRecords
January5
February3
March2
April1
May211
June773
July1,605
August1,739
September1,563
October226
November5
December7

Monthly north american deermouse occurrence records (iNaturalist and GBIF) in Wisconsin, 2000–2026.

Seasonality

Year-round in Wisconsin, with recorded sightings peaking in July–September.

Occurrence map

Where North American Deermouse has been recorded in Wisconsin

300 records mapped · zoom and drag to explore

300 Wisconsin records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Nicolet National Forest 14
Governor Knowles State Forest 3
Willow River State Park 2
American Legion State Forest 1
Chequamegon National Forest 1

Protected places with the most north american deermouse sightings, from the USGS Protected Areas Database plus named mountain ranges, good spots to look, not a full breakdown, so they don't sum to the total.

Where it's recorded in Wisconsin

CountyRecords
Price County 2,773
Lincoln County 1,946
Vilas County 1,215
Iron County 66
Forest County 56
Florence County 22
Dane County 11
Ashland County 10
Milwaukee County 5
Portage County 3
Burnett County 3
Columbia County 2
19 other counties 29

The complete county distribution, spread across 31 Wisconsin counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Wisconsin records under the scientific-name concept Peromyscus maniculatus link the Lake Superior shore and Chequamegon-Nicolet with a much wider set of open, forest-edge, and wetland-margin survey sites. The June–September concentration is exceptionally strong, matching the main season for small-mammal trapping and specimen work more clearly than a claim that deer mice are absent in winter.

GBIF supplies 6,127 of the 6,141 records, while only 53 are from iNaturalist. That imbalance means the map is chiefly a history of institutional sampling and taxonomy, not deer-mouse abundance; repeated survey grids and changing species concepts can shape both the totals and their locations.

Deer Mouse (Peromyscus maniculatus) (9310532204)
Full species profile North American Deermouse Peromyscus maniculatus Size 8–10 cm3.1–3.9 in Weight 21 g0.7 oz Lifespan Up to 8.3 yr View the full profile

More mammals in Wisconsin in the atlas

Data & sources

The data and visualizations on this page draw on these open sources:

  • GBIFCC-BY 4.0occurrence records behind the range map, elevation, and record counts
  • iNaturalistCC0 / CC-BY / CC-BY-SAobservations, photos, and audio recordings
  • NatureServe ExplorerCC-BYthe state conservation rank
  • IUCN Red Listattributed factthe global conservation status
  • USGS NASpublic domainnative / introduced status
  • Natural Earthpublic domainthe relief basemap
  • USFSpublic domainnational-forest boundaries
  • USGS Protected Areas Databasepublic domainthe named parks, forests, and refuges behind "notable places to look"