Wyoming mammals

Eastern Gray Squirrel in Wyoming

Sciurus carolinensis

Introduced to Wyoming

NatureServe flags this species as exotic (non-native) in Wyoming.

IUCN Red List status

LC – Least Concern

Widespread and abundant; not at risk.

Photo: Charles J. Sharp · CC BY-SA 4.0Grey squirrel (Sciurus carolinensis) 01Photo: grendel|khan · CC BY-SA 3.0Squirrel closeup profile.gkPhoto: Tom Friedel · CC BY 3.0Eastern Grey SquirrelPhoto: لا روسا · CC BY-SA 4.0Eastern Gray Squirrel, Barbican Centre, londonPhoto: Diliff · CC BY-SA 3.0Eastern Grey Squirrel in St James's Park, London - Nov 2006 edit

Eastern Gray Squirrel in Wyoming, by the numbers

Occasional in Wyoming 76th most recorded of 126 mammals logged in Wyoming

29 occurrence records

28 with iNaturalist photos

Jun 6, 2026 Last seen in Wyoming

Records from 2000–2026.

When to look for the Eastern Gray Squirrel in Wyoming

Most sightings fall in September to October.

29 Wyoming occurrence records (iNaturalist and GBIF) by month of year, 2000–2026. Shows when the species is recorded, not a guarantee of presence. Based on a small number of dated records; the seasonal pattern may not be representative.

Monthly Wyoming records (table)

Month	Records
January	0
February	0
March	0
April	0
May	1
June	4
July	3
August	4
September	7
October	8
November	2
December	0

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

Seasonality

Year-round in Wyoming, with recorded sightings peaking in September–October.

Occurrence map

Where Eastern Gray Squirrel has been recorded in Wyoming

29 records mapped · zoom and drag to explore

29 Wyoming records mapped

Where it's recorded in Wyoming

County	Records
Campbell County	23
Sheridan County	4
Johnson County	2

The complete county distribution, spread across 3 Wyoming counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Eastern gray squirrel is not native to Wyoming; NatureServe flags the species as exotic, and its 29 recorded sightings cluster around Medicine Bow National Forest and nearby high-plains stream corridors, likely urban and park plantings rather than wild colonization of this squirrel’s native eastern hardwood range.

Reports rise from June through October, tracking the warm months when squirrels are most active foraging and easiest to spot in town parks and yards. With iNaturalist and GBIF totals nearly matched, this is one of the more consistently photographed introduced mammals in this rank band.

Occurrence data from iNaturalist and GBIF.

Eastern Gray Squirrel in other states

View all states →

Full species profile Eastern Gray Squirrel Sciurus carolinensis Size 23–30 cm9.1–11.8 in Weight 400–710 g0.9–1.6 lb Lifespan 8 yr View the full profile

More mammals in Wyoming 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
Natural Earthpublic domainthe relief basemap
USFSpublic domainnational-forest boundaries