Maine mammals

Eastern Gray Squirrel in Maine

Sciurus carolinensis

Native to Maine S5 Secure in Maine

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

Eastern Gray Squirrel in Maine, by the numbers

Common in Maine 6th most recorded of 85 mammals logged in Maine

1,402 occurrence records
1,369 with iNaturalist photos
Jul 6, 2026 Last seen in Maine

Records from 2000–2026.

1,402 total records count every Maine occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 300; the monthly chart covers the 1,397 records with a full observation date.

When to look for the Eastern Gray Squirrel in Maine

Most sightings fall in March to June.

1,397 Maine occurrence records (iNaturalist and GBIF) by month of year, 2000–2026. Shows when the species is recorded, not a guarantee of presence.

Monthly Maine records (table)
MonthRecords
January97
February76
March127
April156
May125
June119
July76
August102
September153
October135
November122
December109

Monthly eastern gray squirrel occurrence records (iNaturalist and GBIF) in Maine, 2000–2026.

Seasonality

Year-round in Maine, with recorded sightings peaking in March–June, with a smaller rise in August–January.

Occurrence map

Where Eastern Gray Squirrel has been recorded in Maine

300 records mapped · zoom and drag to explore

300 Maine records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Acadia National Park 18
Bay Bridge Landing Wetland Park 5
Mackworth Island 2
Little Moose Unit 1
Two Lights State Park 1
Sebago Lake State Park 1
Dwight B. Demeret Forest 1

Protected places with the most eastern gray 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 Maine

CountyRecords
Cumberland County 403
Penobscot County 264
Kennebec County 172
Hancock County 128
York County 111
Waldo County 58
Oxford County 35
Knox County 35
Franklin County 34
Lincoln County 31
Androscoggin County 31
Somerset County 23
4 other counties 77

The complete county distribution, spread across 16 Maine counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Of Maine’s 1,402 eastern gray squirrel records, the great majority sit in the southern half of the state. Cumberland County alone holds 403, with Penobscot and Kennebec well behind, and the map thins steadily northward as spruce and fir replace the oak, hickory, and beech this squirrel is built around.

An animal of the hardwood belt

Gray squirrels live by the nut crop, burying thousands of acorns each fall and finding them again by smell under the snow. That diet ties them to mature deciduous woods, village shade trees, and old farms, which is why Maine’s records cluster in the coastal and southern counties, at places like Mackworth Island, Two Lights State Park, and Bay Bridge Landing Wetland Park, with Acadia National Park anchoring the counts farther east. In the big conifer woods of the interior, the smaller red squirrel is the resident tree squirrel, and the gray squirrel largely gives way.

Busy in every season

Gray squirrels do not hibernate, and Maine’s calendar shows it, with reports spread across all twelve months. Autumn is the conspicuous season, as squirrels cut and cache nuts in the open, but they stay active on mild winter days and shift to buds, bark, and stored food until spring.

Status in Maine

NatureServe ranks the eastern gray squirrel S5, Secure, in Maine, and the species is native to the state. USGS NAS does not list it as nonindigenous here.

Occurrence data from iNaturalist and GBIF.

Eastern Gray Squirrel in other states

View all states →

More mammals in Maine 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"