Squirrels Or Mice In The Attic? How To Tell

Movement overhead in daylight is almost always a tree squirrel. Movement after dark is usually mice, with one Ohio exception worth knowing about. What settles it is not the sound at all: it is the debris on the attic floor, the width of the gnaw marks and the size of the opening the animal is using.

The answer decides who you call. Mice and rats working into a house are rodent control work, sealed out and monitored the way we handle them around North Canton and the rest of Stark County. Squirrels are wild animals, and Ohio puts paid work on them under a different license entirely. Spending a week working on the wrong animal is how a small problem turns into a bigger one.

Start With The Clock, Then Stop Trusting It

The time of the noise is a useful first filter and a bad final answer. Penn State Extension puts the rule in reverse, which is the clearest way to say it: flying squirrels are the only squirrels active at night. Gray and fox squirrels run in daylight, so thumping and rolling overhead at eight in the morning points well away from mice.

Nights are where people go wrong. House mice are active after dark, and Nebraska Extension describes sightings coming during their nocturnal travels. But Ohio has a nocturnal squirrel too. The Ohio Department of Natural Resources lists the southern flying squirrel as a resident species that nests in tree hollows, and University of Missouri Extension calls flying squirrels shy, strictly nocturnal animals that may move into attics, walls or vacant cabins. Penn State adds that their small size makes them likely to nest in attics and other spaces they can get into, and that groups of them live in the closets and wall cavities of cabins. So a 2 a.m. scurry does not narrow it to mice.

What Is Lying On The Attic Floor

This is the part that actually identifies the animal, and you can read it with a flashlight from the hatch without crawling anywhere.

Photograph whatever you find before you disturb it. We walked through the five things people most often find and misread in mouse droppings, or something else, and chewed wiring has its own set of tells in what rodent damage to wires looks like. One warning on cleanup either way: the Internet Center for Wildlife Damage Management notes that flying squirrel droppings have been associated with murine typhus, so cleanup wants gloves and a real mask rather than bare hands and a shop vac.

The Hole Is The Part People Get Wrong

Most homeowners assume a small hole means mice and a big hole means squirrels. Half of that holds. A house mouse needs almost nothing: the CDC puts them through openings as small as a quarter of an inch. The surprise is the other end. The wildlife damage center reports that flying squirrels use holes the size of a quarter, so a coin sized gap at a gable vent rules out nothing at all.

Gray squirrels are the ones that make their own door, and that changes what has to go over it. Kentucky Extension is blunt that squirrels chew through steel wool and window screening, so exclusion calls for quarter inch or half inch hardware cloth or 26 gauge metal. Penn State wants openings closed with heavy half inch wire mesh. Nebraska Extension sequences it: fill the gap with caulk or foam first, then cover it with metal flashing or screen, and secure air vents with quarter inch hardware cloth from outside the building. Our full map of where a house actually leaks is in how mice get into an Ohio house.

Why December And January Change The Answer

There is a wrong month to close a squirrel out of an attic, and in Northeast Ohio it is the one coming up. University of Maryland Extension gives gray squirrels two breeding periods, December to January and June to July, with a 44 day gestation and three to five young per litter. Penn State reports two litters of two to four young a year for flying squirrels. A female that moves into an attic in midwinter is usually there to raise something.

That is why the order of operations matters more in January than in September. Alabama Extension warns that excluding the parents during nesting can result in mortality for the juveniles left inside the structure, which leaves a homeowner with a dead animal somewhere inaccessible and a sealed wall to open again. Penn State says to close openings to attics but to make sure not to lock squirrels inside, and recommends a one way door over the opening so they can leave and not return, with traps set inside as a precaution after the work is done. Cornell's integrated pest management program adds the realistic footnote: often the animal simply chews back in somewhere else, which is why the wildlife damage center says one way doors work best when the structure is sound. Alabama finishes the thought, permanently repair the holes once the animals are out.

Mice follow a different calendar, which is to say almost none. A heated house in February is as good to them as a heated house in October, so there is no season to wait for and no reason to. What a mouse job looks like once something is already inside, and the order the work goes in, is covered in scratching in the walls and, for anything above the ceiling, in what to do before you touch the insulation.

Who Is Allowed To Do Which Job In Ohio

Ohio splits this work by statute, not by preference. Under Ohio Revised Code 1531.40, nobody may provide nuisance wild animal removal or control services for hire without a license from the chief of the Division of Wildlife. Squirrels, raccoons and bats sit on that side of the line. Mice and rats do not: they are pest control, and the job is exclusion plus control and monitoring, sealing gaps as small as a dime and then proving nothing new is getting in. We laid out where that boundary falls across every pest in what a quarterly plan does not cover.

Practically, it means one phone call can be the wrong phone call. If the debris says squirrel, you want a licensed wildlife operator or your county, and a roofer or carpenter afterwards for the opening. If it says mice, you want somebody who does exclusion for a living, because trapping without sealing just restarts the problem in a month.

A Ten Minute Check Before You Call Anyone

• Write down the clock time: note when you hear it, for two or three nights. Daylight activity is a squirrel. After dark keeps both animals in play.
• Place the sound: inside a wall cavity, or running across the ceiling above you. Penn State has flying squirrels using wall spaces as well as attics, so this narrows rather than decides.
• Look at the floor by the hatch: nut shells, hulls and leaf litter against scattered pointed pellets. This is the single fastest answer in the house.
• Check the insulation surface: runways and shallow tunnels through loose fill, shredded batts pulled into a nest, or nothing disturbed at all.
• Walk the outside twice: once at ground level for quarter inch gaps at the foundation, utility penetrations and the garage door seal, once looking up at the roofline, soffit returns, gable vents and anywhere a limb reaches the roof.
• Leave the opening alone for now: if it reads squirrel in winter, sealing it today is the one move that makes everything harder.

If the evidence points to mice, that is our work and it is worth starting before the colony settles in for the winter. State Termite has been doing it in Stark, Summit, Portage, Wayne and Tuscarawas counties since 1933, and the office answers around the clock, so a 4 a.m. ceiling noise does not have to wait for business hours to become a scheduled inspection. Get a free estimate or call 330-494-6199. If pests come back between treatments, so do we, at no cost.