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 36th most recorded of 75 mammals logged in Michigan

144 occurrence records
63 with iNaturalist photos
Apr 28, 2026 Last seen in Michigan

Records from 2000–2026.

144 total records count every Michigan occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 141; the monthly chart covers the 141 records with a full observation date.

When to look for the Northern Flying Squirrel in Michigan

Most sightings fall in August.

141 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
January2
February2
March1
April7
May13
June11
July11
August45
September21
October12
November8
December8

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

141 records mapped · zoom and drag to explore

141 Michigan records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Ottawa National Forest 68
Baraga State Forest Area 1
University of Michigan Biological Station 1
Manistee National Forest 1
Keweenaw National Historical Park 1

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 79
Chippewa County 9
Marquette County 6
Houghton County 6
Grand Traverse County 3
Leelanau County 3
Baraga County 3
Menominee County 2
Kalkaska County 2
Delta County 2
Keweenaw County 2
Schoolcraft County 2
15 other counties 25

The complete county distribution, spread across 27 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 121 records outnumber iNaturalist’s 63 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"