Michigan mammals

Northern Flying Squirrel in Michigan

Glaucomys sabrinus

Native to Michigan S5 Secure in Michigan

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

Northern Flying Squirrel in Michigan, by the numbers

Occasional in Michigan 35th most recorded of 75 mammals logged in Michigan

283 occurrence records
57 with iNaturalist photos
Apr 28, 2026 Last seen in Michigan

Records from 2000–2026.

283 total records count every Michigan occurrence from GBIF and iNaturalist; the monthly chart covers the 275 records with a full observation date.

When to look for the Northern Flying Squirrel in Michigan

Most sightings fall in August.

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

Monthly Michigan records (table)
MonthRecords
January7
February10
March3
April9
May14
June26
July40
August82
September43
October18
November12
December11

Monthly northern flying squirrel occurrence records (iNaturalist and GBIF) in Michigan, 2000–2026.

Seasonality

Year-round in Michigan, with recorded sightings peaking in August.

Occurrence map

Where Northern Flying Squirrel has been recorded in Michigan

283 records mapped · zoom and drag to explore

283 Michigan records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Ottawa National Forest 74
University of Michigan Biological Station 11
Escanaba State Forest Area 6
Porcupine Mountains Wilderness State Park 4
Shingleton State Foreset Area 3
Sault Ste. Marie State Forest Area 2
Pictured Rocks National Lakeshore 2
Pigeon River Country State Forest Area 2

Protected places with the most northern flying squirrel 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 Michigan

CountyRecords
Gogebic County 89
Cheboygan County 30
Marquette County 17
Menominee County 17
Alger County 14
Chippewa County 14
Ontonagon County 8
Charlevoix County 7
Iron County 6
Delta County 5
Houghton County 5
Schoolcraft County 5
32 other counties 66

The complete county distribution, spread across 44 Michigan counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Northern flying squirrel records span Michigan’s boreal forest belt, from Ottawa National Forest and Keweenaw National Historical Park in the western Upper Peninsula to Huron-Manistee National Forests farther south. As a strictly nocturnal glider, the species is almost never seen in daylight, so most records trace back to nest-box surveys or chance flashlight encounters.

August alone accounts for nearly half the year’s reports, a spike that likely reflects late-summer trapping surveys more than a true seasonal peak in activity. GBIF’s 267 records outnumber iNaturalist’s 57 by nearly five to one, underscoring how much of this species’ documentation comes from research trapping rather than public sightings.

Occurrence data from iNaturalist and GBIF.

More mammals in Michigan 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"