Quick Reference
Scientific Name Sciurus carolinensis
Classification Mammalia / Rodentia / Sciuridae
Size Body 9–12 inches; tail 8–10 inches; total 16–20 inches
Weight 14–21 oz (about 1–1.5 lbs)
Color Grizzled gray with salt-and-pepper appearance; white belly; white-tipped tail hairs
Lifespan 1–2 years average in wild; maximum ~12.5 years
Diet Seeds, nuts, acorns, berries, insects; caches food for winter
Reproduction 2 litters/year; 44-day gestation; 2–4 kits per litter; peak births winter/spring and late summer
Entry Gap Needed 1.5 inches
Active Season Year-round; diurnal (daytime active) — peak attic entry pressure fall (Aug–Nov)
Threat Level Moderate — primary concern is electrical wiring fire risk; contributes to estimated 20–25% of undetermined structure fires nationally
Common in OKC Metro Very common east of I-35; found throughout metro in wooded neighborhoods and suburbs

The eastern gray squirrel is the most common tree squirrel in the eastern United States — and one of the most frequent causes of attic calls at Alpha Pest Solutions. In OKC, squirrels are a year-round presence in wooded neighborhoods, along creek corridors, and in any area with mature hardwood trees. They are agile enough to access virtually any roofline and persistent enough to gnaw through marginal exclusion materials until they find their way in.

The wiring risk is the primary reason squirrel activity in an attic requires prompt attention. Squirrels are rodents — their incisors grow continuously, and they gnaw habitually to keep them worn down. Electrical wiring in attics and wall voids is a target. The NFPA estimates rodents are responsible for 20–25 percent of undetermined structure fires in the United States. A squirrel in your attic is a fire risk first and a nuisance second.

Alpha Pest Solutions is a licensed Nuisance Wildlife Control Operator (NWCO) serving Oklahoma City, Edmond, Norman, Moore, Midwest City, Del City, Yukon, Mustang, and the surrounding OKC metro. Call or text (405) 977-0678 for a free inspection.

Identifying Eastern Gray Squirrels

Size: Body 9 to 12 inches, tail 8 to 10 inches. Total length 16 to 20 inches. Weight 14 to 21 ounces — noticeably lighter than a raccoon, heavier than a large rat.

Color: The name is accurate — grizzled gray with a salt-and-pepper effect from alternating light and dark bands on individual hairs. The underside is white or pale. The tail has white-tipped hairs that create a frosted, bushy appearance. Some individuals have cinnamon tones. Melanistic (black) and albino individuals occur but are uncommon.

Movement: Highly distinctive bounding gait. Squirrels move in quick, interrupted bursts — stop, look, bound, stop. On a rooftop or in an attic, the movement pattern is fast and erratic compared to the slower, deliberate movement of a raccoon.

Agility: Squirrels can jump 8 to 10 feet horizontally and up to 15 feet when highly motivated. They can scale virtually any textured surface and descend headfirst due to double-jointed ankles that rotate 180 degrees. Their most common route to the roofline is along the fence line adjacent to the structure — using the fence as a runway to a tree or directly to the eave.

Behavior and Biology

Diurnal — the most important identification clue. Eastern gray squirrels are active during daylight hours, peaking in the two hours after sunrise and the two to five hours before sunset. If sounds in your attic occur during the day, squirrels are the primary suspect. Raccoons and rats are nocturnal.

Continuously growing teeth. Like all rodents, squirrels have incisors that grow throughout their lives. Gnawing on hard materials — wood, wiring, conduit, structural elements — is not optional behavior. It is a biological necessity. This is why squirrel damage to wiring and structural materials is consistent and predictable.

Food caching. Squirrels create thousands of small food caches per season, burying individual nuts and seeds across their home range. This behavior drives the intense fall activity that brings them into contact with structures as they forage aggressively before winter.

Home range. Females maintain a range of 5 to 15 acres; males up to 50 acres. Squirrels are not territorial in the aggressive sense but maintain social hierarchies that give dominant individuals priority access to resources.

Reproduction: Two Breeding Seasons

Eastern gray squirrels have two distinct breeding cycles per year, which means two potential litter events in or near your structure:

  • Winter/spring litter: Breeding December–February; gestation 44 days; kits born February–March
  • Summer/fall litter: Breeding May–June; kits born July–August

Litter size: 1 to 4 kits, average 2 to 3. Females can bear young twice per year for 8 or more years. Food availability is the primary governor of whether a female produces a second litter.

Spring litter timing matters for exclusion. Females actively seek enclosed den sites for birthing. Attics with accessible entry points and minimal human traffic are ideal. If a squirrel has been in your attic since fall, the winter-breeding litter may be present by February or March. As with raccoons, exclusion without litter assessment risks trapping kits inside.

Signs of a Squirrel Problem

Daytime sounds — the primary indicator:

  • Fast, erratic scurrying across the ceiling during daylight hours
  • The distinctive sound of nuts or acorns rolling across the ceiling
  • Scratching and gnawing sounds from within walls or eaves, particularly in early morning
  • Light chattering or alarm calls from within the attic

Entry damage:

  • Gnawed holes in fascia boards, soffit corners, or roof returns
  • Widened gaps at gable vents, ridge vents, or damaged soffit sections
  • Holes in roof shingles where a small gap has been enlarged
  • Visible gnaw marks on exterior wood trim at roofline height

Interior signs:

  • Shredded insulation gathered into nest mounds
  • Scattered nuts or seeds cached in attic corners, inside wall voids, or in stored items
  • Droppings: small (approximately 5–8mm, raisin-sized), oval with rounded ends, clustered near nesting and feeding areas
  • Chewed wiring with exposed copper — the most serious sign

How to Tell If It’s Squirrels and Not Something Else

Time of day is the most reliable differentiator:

  • Daytime sounds = squirrels (in most cases)
  • Nighttime sounds = rats, raccoons, or opossums
  • Sounds at any hour, very heavy = raccoon

Sound weight:

  • Squirrel movement is lighter and faster than raccoon, heavier than mice
  • Nut-rolling sounds are distinctive — virtually nothing else produces them
  • Rapid, frantic scurrying across ceiling in early morning: squirrels

Entry hole size:

  • Squirrels enter through gaps as small as 1.5 inches
  • Squirrel gnaw marks are clean and sharp; raccoon damage is torn and more forceful
  • A hole about the size of a squirrel’s body with clean gnaw marks around the edges is the characteristic squirrel entry

Health Risks

Squirrels present lower direct disease risk to humans than rats or raccoons, but risks are not absent.

Wiring fire risk is the primary concern — not a disease, but a direct safety hazard. Inspect attic wiring if squirrel activity is confirmed.

Salmonellosis: Squirrel droppings can contaminate surfaces and stored food with Salmonella bacteria.

Leptospirosis: Possible transmission through urine-contaminated water or surfaces, though squirrels are a lower-risk vector than rats.

Tularemia: Francisella tularensis, transmissible through handling of sick or dead squirrels or through bites. Low risk for most homeowners — do not handle squirrels with bare hands.

Ectoparasites: Squirrels carry fleas, ticks, and mites. When a squirrel nest is disturbed or the animal is removed, ectoparasites may migrate into living spaces.

Rabies: Squirrels are not primary rabies vectors in Oklahoma. Oklahoma State Department of Health surveillance consistently shows skunks, bats, and raccoons as Oklahoma’s rabies reservoirs. Squirrel rabies transmission to humans is extremely rare nationally.

Property Damage

Electrical wiring: The most serious squirrel-related property damage. Squirrels strip plastic insulation from wires habitually, leaving exposed copper. In an attic — where wiring runs close to wood framing, insulation, and squirrel nesting material — exposed wiring is a genuine fire risk.

If you confirm squirrel activity in your attic and then notice a circuit that has stopped working, get an electrician to inspect before assuming it’s an unrelated issue.

Insulation: Squirrels shred fiberglass batts and displace blown-in insulation to build nests. Heavy squirrel traffic across insulation also compresses it — flattened insulation loses up to 50% of its thermal effectiveness.

Ductwork: Squirrels chew through flexible HVAC ductwork in attics and crawlspaces. Torn ducts reduce heating and cooling efficiency and can circulate squirrel-related debris and dander through the home.

Stored items: Squirrels readily gnaw through cardboard boxes and soft containers. Holiday decorations, stored documents, and seasonal gear in attics are common casualties.

Structural wood: Squirrels gnaw wood framing, roof decking, and fascia boards. Active gnawing on roof decking creates water intrusion pathways.

Where Found in OKC Metro

Eastern gray squirrels are found east of the 97th meridian in Oklahoma — which includes all of OKC and the eastern metro. OSU Extension notes that gray squirrels require mature forests for shelter and food, but urban tree canopies in OKC provide equivalent habitat.

Wooded older neighborhoods: Nichols Hills, Heritage Hills, Crown Heights, and older northeast OKC neighborhoods with established hardwood canopy support the highest urban squirrel densities.

Edmond: The eastern portions of Edmond with mature tree canopy and creek corridor connections have consistent squirrel pressure. Properties near Arcadia Lake drainage and Spring Creek have particularly active squirrel populations.

Norman and Moore: Eastern Norman with its oak woodland character supports gray squirrels throughout. More sparsely wooded western portions are less affected.

Suburban neighborhoods with bird feeders: Bird feeders are squirrel attractants. Neighborhoods with high bird feeder density concentrate squirrel activity and bring them into regular proximity with structures.

Fox squirrel (Sciurus niger): The fox squirrel also occurs in Oklahoma, including the OKC metro. Fox squirrels are larger (up to 2 lbs), more reddish-orange in color, and prefer more open woodland than gray squirrels. They cause the same structural problems and are handled the same way. See our Fox Squirrel page.

Seasonal Patterns

Fall (August–November) — peak entry pressure: The primary squirrel entry season. As mast crops (acorns, pecans, hickory nuts) mature, squirrels forage intensively and begin searching for sheltered denning sites for winter. August through October is when most new squirrel attic entries occur.

Winter (December–February): Squirrels do not hibernate but enter periods of reduced activity during extreme cold. A squirrel in the attic in January may be relatively inactive — but the wiring and insulation damage is accumulating regardless. Winter is also breeding season for the first litter.

Spring (March–May): Second period of increased entry attempts as squirrels expand range and females seek spring denning sites. First litter kits from winter breeding are weaning and becoming independent by April–May.

Summer (June–August): Second litter born July–August. Juvenile squirrels from the spring litter are actively exploring and may discover structural entry points on their own.

Prevention

The most effective squirrel prevention is professional exclusion — sealing entry points with appropriate materials before the animal gets in or after confirmed removal. The most common access path is via the fence line and then along the roofline to a soffit transition or gable vent. Overhanging branches within 6 to 8 feet of the roofline are a close second.

Standard aluminum vent louvers and soffit screens are not squirrel-resistant — they gnaw through them quickly. Proper exclusion involves galvanized hardware cloth secured with metal fasteners, metal flashing at transitions, and chimney caps as needed. Call or text (405) 977-0678 for a free inspection.

How Alpha Pest Solutions Handles Squirrels

Squirrel situations vary — some are straightforward attic entries with a clear exclusion path, others involve litters, multiple entry points, or prior failed DIY attempts. Our approach:

Step 1: Inspection. Full roofline and attic inspection identifies all entry points, nesting sites, and — if spring — litter status.

Step 2: Exclusion and trapping. Live trapping with commercial-grade equipment. Trapping combined with entry-point sealing is generally the most reliable approach for squirrels.

Step 3: Litter assessment (spring). If a litter is present, the timeline adjusts to the kits’ development. Trapping the mother before kits can follow her traps them in the structure.

Step 4: Entry point sealing. After all squirrels are confirmed out, we seal every entry point with hardware cloth and metal flashing.

Step 5: Wiring inspection. We note any visible wiring damage during attic inspection. Wiring repair should be assessed by a licensed electrician after squirrel removal.

Step 6: Insulation and remediation assessment. If insulation has been significantly displaced or contaminated, replacement may be warranted. For attic remediation, see Attic Remediation.

Legal Status in Oklahoma

Eastern gray squirrels are classified as a game animal in Oklahoma, and nuisance removal in a structure is handled by a licensed NWCO — Alpha Pest Solutions holds that license. The Oklahoma Department of Wildlife Conservation provides oversight on wildlife handling and relocation. We handle the regulatory side so you don’t have to.

Frequently Asked Questions

I hear something in my attic during the day. Is it squirrels?

Daytime attic sounds are the most reliable squirrel indicator — raccoons and rats are nocturnal. If you’re hearing rapid scurrying, scratching, or rolling and bouncing sounds during daylight hours, particularly in early morning, squirrels are the leading suspect. Call or text (405) 977-0678.

How are squirrels getting into my attic?

The most common path: squirrel travels the fence line adjacent to the house, reaches the roofline, and finds or creates a gap at a fascia corner, soffit transition, or damaged vent. Squirrels need only a 1.5-inch gap and will enlarge smaller openings through gnawing. Overhanging tree branches are almost always part of the access chain.

Is squirrel damage really a fire risk?

Yes. Squirrels gnaw through wire insulation as a matter of course. Exposed copper wiring in an attic — surrounded by wood framing, insulation, and squirrel nesting material — is a genuine fire hazard. Treat the wiring inspection as a priority once squirrel activity is confirmed.

Will squirrels leave on their own?

No. A squirrel that has established a nest will not leave voluntarily, particularly during winter or when a litter is present. New squirrels will find the same entry points once the current occupants are removed if exclusion work is not completed.

Do I need a professional, or can I handle this myself?

We are the right call. Nuisance squirrel removal is handled by licensed NWCOs, and incomplete exclusion — missing one entry point — results in re-entry within days to weeks. Inspections are free.

I found squirrel droppings in my attic. Is there a health risk?

Moderate. Standard precautions — gloves, dust mask, avoid disturbing dry material — apply during cleanup. Heavily infested insulation warrants professional remediation. See Attic Remediation.

Related Services and Pests

Get a Free Wildlife Inspection in Oklahoma City

Hearing daytime scurrying or rolling sounds in your attic? Finding gnaw damage at your roofline? Call or text Alpha Pest Solutions at (405) 977-0678 for a free inspection. We identify all entry points, assess wiring risk, and provide permanent exclusion. We serve Oklahoma City, Edmond, Norman, Moore, Midwest City, Del City, Yukon, Mustang, and the surrounding OKC metro. Monday through Friday, 8am to 6pm.