Squirrels are a familiar sight in both urban and rural landscapes, often spotted in backyards, parks, and wooded areas. There are around 65 species of squirrels found throughout North America. While they may look similar at a glance, there are several types of squirrels you’re likely to see around your home, including tree squirrels, ground squirrels, and flying squirrels. Each has its own habits, preferred habitats, and ways of interacting with your property.
The most common types of squirrels to cause problems are tree squirrels, specifically the Eastern Gray Squirrel.
| State | Species | Scientific Name | Habitat | Nuisance Level | Season Activity | Source |
|---|---|---|---|---|---|---|
| State | Species | Scientific Name | Habitat | Nuisance Level | Seasonal Activity | Source |
| Alabama | Eastern Gray Squirrel | Sciurus carolinensis | Hardwood & mixed forests; parks & neighborhoods | High | Year-round; diurnal; peaks early/late day | Year-round; single breeding season, late spring |
| Alabama | Fox Squirrel | Sciurus niger | Upland mature pine & mixed pine–hardwood; open understory | High | Year-round; more active mid-morning & late afternoon | https://www.outdooralabama.com/rodents/fox-squirrel |
| Alabama | Southern Flying Squirrel | Glaucomys volans | Mature hardwood forests; cavities; may use buildings | Moderate | Nocturnal; active year-round (peak activity noted in fall) | https://www.outdooralabama.com/rodents/southern-flying-squirrel |
| Arkansas | Eastern Gray Squirrel | Sciurus carolinensis | Hardwood & mixed forests; parks & neighborhoods | High | Year-round; diurnal; peaks early/late day | |
| Arkansas | Eastern Fox Squirrel | Sciurus niger | Open woodlands, agricultural edges | Moderate | Year-round; diurnal | |
| Arkansas | Southern Flying Squirrel | Glaucomys volans | Mature hardwood forests; cavities; may use buildings | Moderate | Nocturnal; active year-round (peak activity noted in fall) | |
| Alaska | American Red Squirrel | Tamiasciurus hudsonicus | Spruce & mixed forests; widespread over most of AK | Low | Year-round; diurnal | |
| Arizona | Abert’s Squirrel | Sciurus aberti | Ponderosa pine forests (statewide highlands) | Year-round; single breeding season late spring | Low | |
| Arizona | Arizona Gray Squirrel | Sciurus arizonensis | Diurnal; most active spring–fall (heat-adapted) | Year-round; diurnal | Low | |
| Arizona | American Red Squirrel | Tamiasciurus hudsonicus | Higher elevation spruce–fir above ~8,500 ft | Low | Year-round; caches cones | |
| Arizona | Harris’s Antelope Squirrel (ground) | Ammospermophilus harrisii | Desertscrub & open arid habitats; burrowing | Diurnal; most active spring–fall (heat adapted) | Moderate | |
| California | Western Gray Squirrel | Sciurus griseus | Oak & conifer forests in Sierra Nevada, Coast & Cascade ranges | Moderate | Year-round; game mammal (regulated) | |
| California | Douglas Squirrel (aka Chickaree) | Tamiasciurus douglasii | Montane conifer forests statewide (north & Sierra) | Low | Year-round; game mammal (regulated) | |
| California | Northern Flying Squirrel | Glaucomys sabrinus | Mature conifer forests; nocturnal; Sierra & northern ranges | Low | Nocturnal; not a game species | |
| California | Eastern Gray Squirrel (introduced) | Sciurus carolinensis | Urban/suburban in many metros | High | Year-round; game mammal (regulated) | |
| California | Eastern Fox Squirrel (introduced) | Sciurus niger | Urban/suburban; riparian & ag interfaces in valleys | Moderate | Year-round; diurnal | |
| Colorado | Fox Squirrel | Sciurus niger | Urban/suburban woodlands statewide | Year-round; diurnal | High | |
| Colorado | Abert’s Squirrel | Sciurus aberti | Ponderosa pine forests (specialist) | Year-round; does not hoard; eats host tree parts | Low | |
| Colorado | American Red Squirrel (Pine Squirrel) | Tamiasciurus hudsonicus | High timber conifer forests | Low | Year-round; caches cones; no hibernation | |
| Connecticut | Eastern Gray Squirrel | Sciurus carolinensis | Hardwood forests; suburban & urban areas | High | Year‑round; diurnal | |
| Connecticut | American Red Squirrel | Tamiasciurus hudsonicus | Conifer and mixed forests | Low | Year‑round; diurnal | |
| Connecticut | Southern Flying Squirrel | Glaucomys volans | Mature hardwood forests; tree cavities | Low | Nocturnal; active year-round (peak activity noted in fall) | |
| Connecticut | Eastern Gray Squirrel | Sciurus carolinensis | Forests, parks, residential areas | High | Year‑round; diurnal | |
| Delaware | Eastern Gray Squirrel | Sciurus carolinensis | Hardwood forests; suburban & urban areas | High | Year‑round; diurnal | |
| Delaware | Delmarva Fox Squirrrel | Sciurus niger cinereus | Prefers mature, open-understory fores with mixed hardwoods and pines | |||
| Delaware | American Red Squirrel | Tamiasciurus hudsonicus | Conifer and mixed forests | Low | Year‑round; diurnal | |
| Delaware | Southern Flying Squirrel | Glaucomys volans | Mature hardwood forests; tree cavities | Low | Nocturnal; active year-round (peak activity noted in fall) | |
| Florida | Eastern Gray Squirrel | Sciurus carolinensis | Urban/Suburban Forest | High | Year‑round; diurnal | |
| Florida | Fox Squirrel | Sciurus niger | Urban/Suburban Forest | High | ||
| Florida | Southern Flying Squirrel | Glaucomys volans | Forested (Attics/Structures) | High | Nocturnal; active year-round (peak activity noted in fall) | |
| Georgia | Eastern Gray Squirrel | Sciurus carolinensis | Urban/Suburban Forest | High | Year‑round; diurnal | |
| Georgia | Fox Squirrel | Sciurus niger | Urban/Suburban Forest | High | ||
| Georgia | Southern Flying Squirrel | Glaucomys volans | Forested (Attics/Structures) | High | Nocturnal; active year-round (peak activity noted in fall) | |
| Hawaii | (No native or established tree squirrel species) | — | — | — | ||
| Idaho | American Red Squirrel | Tamiasciurus hudsonicus | Montane and subalpine conifer forests | Low | Year‑round; diurnal | |
| Idaho | Northern Flying Squirrel | Glaucomys sabrinus | Mature conifer & mixed forests | Low | Nocturnal; year‑round | |
| Idaho | Eastern Gray Squirrel (introduced, localized) | Sciurus carolinensis | Urban areas in parts of southern Idaho | Moderate | Year‑round; diurnal | |
| Idaho | Eastern Fox Squirrel | Sciurus niger | Mature, open-canopy hardwood trees, agicultural edges | Moderate | Year-round; diurnal | |
| Idaho | Red Squirrel | Tamiasciurus hudsonicus | Dense, mature coniferous forests particulary at mid-to-high elevations in central and northern Idaho | Low | Year‑round; diurnal | |
| Idaho | Northern Flying Squirrel | Glaucomys sabrinus | Mature conifer & mixed forests | Low | Nocturnal; year‑round | |
| Illinois | Eastern Gray Squirrel | Sciurus carolinensis | Closed-canopy nut-bearing forests; cities | Year-round; diurnal | Year‑round; diurnal | |
| Illinois | Fox Squirrel | Sciurus niger | Forest edges, woodlots, fencerows; cities | Year-round; diurnal | High | |
| Illinois | American Red Squirrel | Tamiasciurus hudsonicus | Dense conifer & hardwood forests (NE IL) | Low | Year‑round; diurnal | |
| Illinois | Southern Flying Squirrel | Glaucomys volans | Hardwood forests near water; cavities; buildings | Moderate | Nocturnal; active year-round (peak activity noted in fall) | |
| Illinois | Thirteen-lined Ground Squirrel | Ictidomys tridecemlineatus | Short grass areas (lawns, parks, cemeteries) | Active spring–fall; hibernates Nov–Mar | Moderate | |
| Indiana | Eastern Gray Squirrel | Sciurus carolinensis | Hardwood forests; urban & suburban areas | High | Year‑round; diurnal | |
| Indiana | Eastern Fox Squirrel | Sciurus niger | Open woodlands, agricultural edges | Moderate | Year-round; diurnal | |
| Iowa | Eastern Gray Squirrel | Sciurus carolinensis | Wooded riparian corridors, towns | High | Year‑round; diurnal | |
| Iowa | Eastern Fox Squirrel | Sciurus niger | Open agricultural landscapes with trees | Moderate | Year-round; diurnal | |
| Kansas | Eastern Fox Squirrel | Sciurus niger | Statewide in open woodlands & towns | Moderate | Year-round; diurnal | |
| Kansas | Eastern Gray Squirrel | Sciurus carolinensis | Riparian forests in east | Moderate | Year‑round; diurnal | |
| Kentucky | Eastern Gray Squirrel | Sciurus carolinensis | Hardwood forests; towns & cities | High | Year‑round; diurnal | |
| Kentucky | Eastern Fox Squirrel | Sciurus niger | Open woods and farmland | Moderate | Year‑round; diurnal | |
| Kentucky | American Red Squirrel | Tamiasciurus hudsonicus | Conifer forests (limited range) | Low | Year‑round; diurnal | |
| Kentucky | Southern Flying Squirrel | Glaucomys volans | Mature hardwood forests | Low | Nocturnal; active year-round (peak activity noted in fall) | |
| Louisiana | Eastern Gray Squirrel | Sciurus carolinensis | Bottomland hardwood forests; urban areas | High | Year‑round; diurnal | |
| Louisiana | Eastern Fox Squirrel | Sciurus niger | Open forests, floodplains, farmland | Moderate | Year‑round; diurnal | |
| Louisiana | Southern Flying Squirrel | Glaucomys volans | Hardwood forests; riparian corridors | Low | Nocturnal; active year-round (peak activity noted in fall) | |
| Maine | American Red Squirrel | Tamiasciurus hudsonicus | Boreal and mixed forests | Low | Year‑round; diurnal | |
| Maryland | Eastern Gray Squirrel | Sciurus carolinensis | Statewide forests, parks, neighborhoods | High | Year‑round; diurnal | |
| Maryland | Eastern Fox Squirrel | Sciurus niger | Open woodlands, agricultural edges | Moderate | Year-round; diurnal | |
| Maryland | Southern Flying Squirrel | Glaucomys volans | Mature hardwood forests | Low | Nocturnal; active year-round (peak activity noted in fall) | |
| Massachusetts | Eastern Gray Squirrel | Sciurus carolinensis | Hardwood forests and urban areas | High | Year‑round; diurnal | |
| Massachusetts | American Red Squirrel | Tamiasciurus hudsonicus | Conifer and mixed forests | Low | Year‑round; diurnal | |
| Michigan | Eastern Gray Squirrel | Sciurus carolinensis | Urban/suburban & hardwood forests | Year-round; diurnal | Year‑round; diurnal | |
| Michigan | Fox Squirrel | Sciurus niger | Urban/suburban & hardwoods | Year-round; diurnal | High | |
| Michigan | American Red Squirrel | Tamiasciurus hudsonicus | Coniferous forests; caches cones | Low | Year‑round; diurnal | |
| Michigan | Southern Flying Squirrel | Glaucomys volans | Mature forests; cavities; protected (no season) | Moderate | Nocturnal; active year-round (peak activity noted in fall) | |
| Michigan | Northern Flying Squirrel | Glaucomys sabrinus | Northern forests; cavities; protected | Low | Nocturnal; year‑round | |
| Michigan | Thirteen-lined Ground Squirrel | Ictidomys tridecemlineatus | Grasslands, open areas | Spring–fall active; hibernates in winter | Moderate | |
| Minnesota | Fox Squirrel | Sciurus niger | Open woodlands, shelter belts, parks; common W & central | High | Year-round; mates Dec–Feb & Jun–Jul | https://www.dnr.state.mn.us/mammals/foxsquirrel.html |
| Minnesota | Gray Squirrel | Sciurus carolinensis | Hardwood forests, wooded parks & residential areas | High | Year-round; mates Dec–Feb and/or Jun–Aug | https://www.dnr.state.mn.us/mammals/graysquirrel.html |
| Minnesota | American Red Squirrel | Tamiasciurus hudsonicus | Coniferous woods statewide; also thickets | Low | Year-round; diurnal | https://www.dnr.state.mn.us/mammals/redsquirrel.html |
| Minnesota | Northern & Southern Flying Squirrels | Glaucomys sabrinus | Northern conifer forests | Low | Nocturnal; non-hibernating; one (north) or two (south) litters | https://www.dnr.state.mn.us/mammals/flyingsquirrel.html |
| Minnesota | Southern Flying Squirrel | Glaucomys volans | southern hardwoods | Low | Nocturnal; non-hibernating; one (north) or two (south) litters | https://www.dnr.state.mn.us/mammals/flyingsquirrel.html |
| Mississippi | Eastern Gray Squirrel | Sciurus carolinensis | Hardwood forests; statewide | Year-round; active dawn/dusk | Year‑round; diurnal | |
| Mississippi | Fox Squirrel | Sciurus niger (S. n. bachmani; S. n. subauratus) | Upland pine–hardwood (hill country) & Mississippi Delta forests | High | Year-round; diurnal | Year-round; diurnal |
| Mississippi | Southern Flying Squirrel | Glaucomys volans | Hardwood forests; nocturnal; not a game species | Moderate | Nocturnal; non-hibernating; one (north) or two (south) litters | |
| Missouri | Eastern Gray Squirrel | Sciurus carolinensis | More abundant in Ozark & Mississippi Lowland regions | High | Year‑round; diurnal | https://mdc.mo.gov/discover-nature/field-guide/eastern-gray-squirrel-eastern-fox-squirrel | https://mdc.mo.gov/wildlife/nuisance-problem-species/squirrel-control |
| Missouri | Eastern Fox Squirrel | Sciurus niger | More common in northern & western plains; open woods | High | Year-round; diurnal | https://mdc.mo.gov/discover-nature/field-guide/eastern-gray-squirrel-eastern-fox-squirrel | https://mdc.mo.gov/hunting-trapping/species/squirrel |
| Missouri | Southern Flying Squirrel | Glaucomys volans | Statewide in forests; tree cavities; nocturnal | Moderate | Nocturnal; active year-round | https://mdc.mo.gov/discover-nature/field-guide/southern-flying-squirrel |
| Montana | American Red Squirrel | Tamiasciurus hudsonicus | Conifer forests statewide | Low | Year-round; diurnal | |
| Nebraska | Eastern Fox Squirrel | Sciurus niger | Statewide; farmland & towns | Moderate | Year-round; diurnal | |
| Nevada | Western Gray Squirrel | Sciurus griseus | Western NV woodlands; limited distribution | Low | Year-round; diurnal | |
| New Hampshire | American Red Squirrel | Tamiasciurus hudsonicus | Statewide conifer and mixed forests | Low | Year-round; diurnal | |
| New Jersey | Eastern Gray Squirrel | Sciurus carolinensis | Forests, suburbs, urban areas | High | Year‑round; diurnal | |
| New Jersey | Southern Flying Squirrel | Glaucomys volans | Deciduous forests; cavities | Low | Nocturnal; year-round | |
| New Mexico | Abert’s Squirrel | Sciurus aberti | Ponderosa pine forests statewide | Low | Year-round; diurnal | |
| New Mexico | Western Gray Squirrel | Sciurus griseus | Southwestern NM oak forests | Low | Year-round; diurnal | |
| New York | Eastern Gray Squirrel | Sciurus carolinensis | Statewide woodlands, suburban & urban areas | High | Year‑round; diurnal | https://extapps.dec.ny.gov/docs/administration_pdf/squirrels.pdf | https://dec.ny.gov/things-to-do/hunting/small-game/seasons |
| New York | American Red Squirrel (unprotected) | Tamiasciurus hudsonicus | Conifer & mixed forests statewide | Moderate | Year-round; diurnal | https://dec.ny.gov/things-to-do/hunting/small-game | https://extapps.dec.ny.gov/docs/administration_pdf/squirrels.pdf |
| New York | Eastern Fox Squirrel (limited range) | Sciurus niger | Western NY (approx. 8 counties); open woodlots/ag mosaics | Low | Year-round; diurnal | https://extapps.dec.ny.gov/fs/programs/dfw/SWAP2025/Mammals/Fox%20squirrel.pdf |
| North Carolina | Eastern Gray Squirrel | Sciurus carolinensis | Hardwood & mixed forests; urban parks | High | Year‑round; diurnal | |
| North Carolina | Fox Squirrel | Sciurus niger | Open pine & pine–oak habitats, sandhills & coastal plain | Moderate | Year-round; diurnal | |
| North Carolina | Southern Flying Squirrel | Glaucomys volans | Mature hardwood forests with cavities; near water | Moderate | Nocturnal; year-round | |
| North Carolina | Northern Flying Squirrel | Glaucomys sabrinus | High-elevation spruce–fir & mixed conifer hardwoods | Low | Nocturnal; year‑round | |
| North Dakota | Eastern Fox Squirrel | Sciurus niger | Introduced; urban & riparian corridors | Low | Year-round; diurnal | |
| Ohio | Eastern Gray Squirrel | Sciurus carolinensis | Large hardwood forests; also urban/suburban | High | Year-round; breeds Dec–Jan & May–Jun | https://ohiodnr.gov/discover-and-learn/animals/mammals/eastern-gray-squirrel | https://ohiodnr.gov/wps/portal/gov/odnr/discover-and-learn/safety-conservation/wildlife-management/nuisance-wildlife/nuisance-squirrels |
| Ohio | Eastern Fox Squirrel | Sciurus niger | Woodlot country in agricultural western/central Ohio | High | Year-round; breeds Dec–Feb & May–Jul | https://ohiodnr.gov/wps/portal/gov/odnr/discover-and-learn/animals/mammals/eastern-fox-squirrel |
| Ohio | Southern Flying Squirrel | Glaucomys volans | Deciduous & mixed forests; tree cavities | Moderate | Nocturnal; breeds Apr–May & Aug–Sep | https://ohiodnr.gov/discover-and-learn/animals/mammals/southern-flying-squirrel |
| Oklahoma | Eastern Fox Squirrel | Sciurus niger | Statewide except extreme west panhandle; varied woodlands | High | Year-round; long season; diurnal | https://www.wildlifedepartment.com/hunting/resources/small-game/squirrel | https://www.wildlifedepartment.com/hunting/regs/small-game-regulations |
| Oklahoma | Eastern Gray Squirrel | Sciurus carolinensis | Eastern Oklahoma hardwoods; parks & backyards | High | Year-round; diurnal | https://www.wildlifedepartment.com/wildlife/field-guide/mammals/eastern-gray-squirrel | https://www.wildlifedepartment.com/outdoorok/ooj/small-game-guide-hunters |
| Oklahoma | Southern Flying Squirrel | Glaucomys volans | Eastern deciduous forests; cavities; nocturnal | Moderate | Nocturnal; active year-round | https://www.wildlifedepartment.com/wildlife/field-guide/mammals/southern-flying-squirrel |
| Oregon | Western Gray Squirrel | Sciurus griseus | Low-elevation oak, pine, mixed forests in western & central OR | Low | Year-round; diurnal | |
| Oregon | Douglas Squirrel | Tamiasciurus douglasii | Primarily west of Cascades; mature mixed-conifer forests | Low | Year-round; diurnal | |
| Oregon | American Red Squirrel | Tamiasciurus hudsonicus | Mixed & conifer forests statewide (esp. east Cascades) | Low | Year-round; diurnal | |
| Oregon | Northern Flying Squirrel | Glaucomys sabrinus | Forested habitats statewide; nocturnal | Low | Nocturnal; active year-round | |
| Pennsylvania | Eastern Gray Squirrel | Sciurus carolinensis | Hardwood and mixed forests; suburban & urban areas | High | Year-round; diurnal | |
| Pennsylvania | American Red Squirrel | Tamiasciurus hudsonicus | Conifer and mixed forests | Low | Year-round; diurnal | |
| Pennsylvania | Eastern Fox Squirrel | Sciurus niger | Agricultural mosaics; open woodlots (western & central PA) | Moderate | Year-round; diurnal | |
| Pennsylvania | Southern Flying Squirrel | Glaucomys volans | Deciduous forests; tree cavities | Low | Nocturnal; year-round | |
| Rhode Island | Eastern Gray Squirrel | Sciurus carolinensis | Forests, parks, residential areas | High | Year‑round; diurnal | |
| Rhode Island | American Red Squirrel | Tamiasciurus hudsonicus | Conifer & mixed forests | Low | Year‑round; diurnal | |
| Rhode Island | Southern Flying Squirrel | Glaucomys volans | Deciduous forests; tree cavities | Low | Nocturnal; year-round | |
| South Carolina | Eastern Gray Squirrel | Sciurus carolinensis | Hardwood forests with mast; residential areas | High | Year‑round; diurnal | |
| South Carolina | Fox Squirrel | Sciurus niger | Mixed longleaf, loblolly & shortleaf pine with hardwoods; bottomlands | Moderate | Year-round; sightings peak spring | |
| South Carolina | American red Squirrel | Tamiasciurus hudsonicu | high-elevation coniferous forests | low | year-round; diiurnal | |
| South Carolina | Southern Flying Squirrel | Glaucomys volans | Mature forests with cavities | Moderate | Nocturnal; year-round | |
| South Dakota | Eastern Fox Squirrel | Sciurus niger | Introduced; towns and shelterbelts | Moderate | Year-round; diurnal | |
| Tennessee | Eastern Gray Squirrel | Sciurus carolinensis | Dense hardwood forests in rural & urban areas; parks | High | Year‑round; diurnal | |
| Tennessee | Fox Squirrel | Sciurus niger | Mature pine & mixed forests with open understory | Moderate | Year-round; diurnal | |
| Tennessee | Southern Flying Squirrel | Glaucomys volans | Mature oak–hickory near water; cavities; attics/birdhouses | High | Nocturnal; 2 breeding peaks (late winter & mid-summer) | |
| Tennessee | Northern Flying Squirrel (Carolina) | Glaucomys sabrinus coloratus | High-elevation moist conifer & mixed forests (>4500 ft) | Moderate | Nocturnal; year-round | Nocturnal; year-round |
| Tennessee | American Red Squirrel | Tamiasciurus hudsonicus | Coniferous & mixed forests in higher elevations | Low | Year‑round; diurnal | |
| Texas | Eastern Gray Squirrel | Sciurus carolinensis | East Texas Pineywoods hardwoods & urban parks | High | Year‑round; diurnal | |
| Texas | Fox Squirrel | Sciurus niger | Statewide woodlands; abundant in eastern third | High | Year-round; diurnal; peaks early/late day | |
| Texas | Southern Flying Squirrel | Glaucomys volans | East TX mature forests; cavities; nongame | Moderate | Nocturnal; year-round | |
| Utah | American Red Squirrel | Tamiasciurus hudsonicus | High-elevation conifer forests | Low | Year-round; diurnal | |
| Utah | Western Gray Squirrel | Sciurus griseus | Southern Utah oak woodlands | Low | Year-round; diurnal | |
| Vermont | American Red Squirrel | Tamiasciurus hudsonicus | Conifer-dominated forests | Low | Year-round; diurnal | |
| Vermont | Eastern Gray Squirrel | Sciurus carolinensis | Southern and low-elevation hardwood forests | High | Year‑round; diurnal | |
| Virginia | Gray Squirrel | Sciurus carolinensis carolinensis | Extensive forests, city parks & backyards | High | Year-round; no hibernation; weather can limit daytime activity | https://dwr.virginia.gov/wildlife/information/gray-squirrel/ |
| Virginia | Fox Squirrel | Sciurus niger (S. n. vulpinus; S. n. niger) | Open woodlots with clearings; mature pine & mixed forests (SE subspecies) | Moderate | Year-round; diurnal; may become inactive in severe winter cold | https://dwr.virginia.gov/wildlife/information/fox-squirrel/ | https://dwr.virginia.gov/wildlife/information/southeastern-fox-squirrel/ |
| Virginia | Southern Flying Squirrel | Glaucomys volans volans | Heavy deciduous timber near water; cavities | Moderate | Nocturnal; peak activity in November; 1–2 litters/yr | https://dwr.virginia.gov/wildlife/information/southern-flying-squirrel/ |
| Virginia | Virginia Northern Flying Squirrel | Glaucomys sabrinus fuscus | High-elevation conifer–hardwood mosaics (spruce–fir ecotones) | Low | Nocturnal; active even in winter; one litter in May–Jun | https://dwr.virginia.gov/wildlife/information/virginia-northern-flying-squirrel/ |
| Washington | Western Gray Squirrel | Sciurus griseus | Oak woodlands & low–mid elevation conifer forests; isolated pops (Klickitat/Yakima, Okanogan/Chelan, Pierce/Thurston) | Low | Diurnal; protected status (no hunting) | |
| Washington | Northern Flying Squirrel | Glaucomys sabrinus | Conifer & mixed forests statewide; nocturnal glider | Low | Nocturnal; active year-round | |
| Washington | Douglas Squirrel | Tamiasciurus douglasii | Mature/mixed conifer forests west of Cascades and east into interior valleys | Low | Year-round; diurnal | |
| Washington | American Red Squirrel | Tamiasciurus hudsonicus | Northeast WA conifer forests | Low | Year-round; diurnal | |
| Washington | Eastern Gray Squirrel (introduced) | Sciurus carolinensis | Urban/suburban parks & yards | High | Year‑round; diurnal | |
| Washington | Eastern Fox Squirrel (introduced) | Sciurus niger | Urban/suburban green spaces | High | Year-round; diurnal | |
| West Virginia | Eastern Gray Squirrel | Sciurus carolinensis | Hardwood forests statewide | High | Year‑round; diurnal | |
| West Virginia | Eastern Fox Squirrel | Sciurus niger | Open woods and ridges | Moderate | Year‑round; diurnal | |
| West Virginia | American Red Squirrel | Tamiasciurus hudsonicus | High‑elevation conifer forests | Low | Year‑round; diurnal | |
| West Virginia | Southern Flying Squirrel | Glaucomys volans | Mature forests; tree cavities | Low | Nocturnal; peak activity in November; 1–2 litters/yr | |
| Wisconsin | Eastern Gray Squirrel | Sciurus carolinensis | Hardwood forests; parks & residential areas | High | Year-round; litters Mar/Apr and Jul/Aug | https://dnr.wisconsin.gov/topic/WildlifeHabitat/orphan/Squirrel |
| Wisconsin | Fox Squirrel | Sciurus niger | Open woodlands, shelter belts, parks, residential | High | Year-round; diurnal | https://dnr.wisconsin.gov/topic/WildlifeHabitat/orphan/Squirrel |
| Wisconsin | American Red Squirrel | Tamiasciurus hudsonicus | Conifer & mixed forests | Low | Year-round; diurnal | https://dnr.wisconsin.gov/topic/WildlifeHabitat/orphan/Squirrel |
| Wisconsin | Northern & Southern Flying Squirrels | Glaucomys sabrinus; Glaucomys volans | Northern conifer/mixed (G. sabrinus); statewide hardwoods (G. volans) | Low | Nocturnal; protected species in WI | https://dnr.wisconsin.gov/topic/WildlifeHabitat/orphan/Flying_Squirrel |
| Wyoming | American Red Squirrel | Tamiasciurus hudsonicus | Montane conifer forests | Low | Year-round; diurnal |