Oregon mammals

Northern Flying Squirrel in Oregon

Glaucomys sabrinus

Native to Oregon S4 Apparently Secure in Oregon

Not listed as nonindigenous in Oregon by USGS NAS; native to its Oregon 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 Oregon, by the numbers

Rare in Oregon 123rd most recorded of 178 mammals logged in Oregon

466 occurrence records
5 with iNaturalist photos
Jan 10, 2022 Last seen in Oregon

Records from 2000–2026.

466 total records count every Oregon occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 300; the monthly chart covers the 462 records with a full observation date.

When to look for the Northern Flying Squirrel in Oregon

Most sightings fall in May to June.

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

Monthly Oregon records (table)
MonthRecords
January6
February9
March8
April5
May82
June108
July16
August30
September43
October102
November29
December24

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

Seasonality

Year-round in Oregon, with recorded sightings peaking in May–June, with a smaller rise in October.

Occurrence map

Where Northern Flying Squirrel has been recorded in Oregon

300 records mapped · zoom and drag to explore

300 Oregon records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Gearhart Mountain Wilderness 4
Eagle Cap Wilderness 4
Crater Lake National Park 4
Siuslaw National Forest 3
Umatilla National Forest 3
Oregon Caves National Monument and Preserve 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 Oregon

CountyRecords
Douglas County 139
Coos County 101
Lane County 41
Wallowa County 33
Tillamook County 24
Umatilla County 22
Union County 16
Lake County 16
Clackamas County 15
Multnomah County 15
Linn County 14
Marion County 4
14 other counties 26

The complete county distribution, spread across 26 Oregon counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Northern flying squirrels don’t actually fly. They glide, stretching a furred membrane between their front and back legs to coast between trees in the conifer forest of the Blue and Wallowa mountains, and they’re a key prey species for the northern spotted owl, one of several reasons old-growth forest structure matters to more than just the trees.

Oregon’s 465 records rest almost entirely on GBIF specimen data, just 5 from iNaturalist, since this strictly nocturnal squirrel almost never crosses paths with a daytime observer or camera. Records bunch around January and again in October and November, likely tracking fall nut-caching activity and winter survey effort rather than a true summer lull, since flying squirrels stay active through the cold months.

Occurrence data from iNaturalist and GBIF.

More mammals in Oregon 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"