Rodent Noises at Night: Mice, Rats or Squirrels?

Light, fast scratching or scurrying inside walls and ceilings at night is usually mice. Heavier thumping, dragging or loud gnawing low in the house, in the basement or lower walls, points to Norway rats. If the noise comes from the attic during the day, especially early morning and late afternoon, it is more likely squirrels. Slow, heavy movement at night in the attic can be a raccoon.

The timing, the weight of the sound and where it comes from narrow it down. Droppings settle it.

Mice: light, quick and everywhere

House mice are small and light, so they make quick scratching, skittering and soft gnawing sounds. You may hear faint squeaks. The sound often moves along a wall or across a ceiling, and in older Cleveland houses with balloon framing it can travel between floors.

Mouse noise peaks from dusk into the early morning hours. You often hear it most when the house is quiet and you are trying to sleep. It is common in kitchen walls, bedroom walls that share a wall with the kitchen or bathroom, ceilings below an attic and the basement.

In Cleveland, mouse noise usually starts in October or November when cold weather pushes mice indoors.

Rats: heavier and lower

Norway rats are much bigger. Cornell's IPM program says adults can reach 11 inches in body length, around 16 inches including the tail. That weight makes noise. You hear thumps, scrabbling, dragging and loud gnawing, usually low in the house: the basement, lower walls, under floors and in crawl spaces.

Rats in Cleveland are ground-dwelling burrowers and rarely live in attics. If heavy noise is coming from the basement or from under the kitchen floor at night, and you find large droppings near the foundation or the furnace, rats are the likely answer.

Squirrels and raccoons: attic and daytime

Gray and fox squirrels are common in Cleveland's tree-lined neighborhoods. They get into attics through gaps at soffits, gable vents and roof edges. Unlike mice and rats, squirrels are active in the daytime. Noise at sunrise and late afternoon, with running and rolling sounds overhead, points to squirrels.

Raccoons are heavier still. They make slow, heavy thumps and sometimes vocal sounds at night, usually in the attic or a chimney.

Squirrels and raccoons are wildlife, not rodent control cases in the usual sense. A good inspection will tell you which animal you have and point you to wildlife removal if needed.

Other sounds to rule out

Not every noise is an animal. Older Cleveland houses make plenty of sounds of their own:

Steam radiators and boiler pipes tick and knock as they heat and cool.
Wood framing creaks as temperatures drop overnight.
Ice dams and wind move gutters and siding.
Ductwork pops as the furnace cycles.

These sounds tend to follow the heating cycle or the weather. Animal noise is more irregular, moves around and often comes with droppings or chewing.

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When the noise is coming from next door

In an up-and-down double, a row of townhomes or an apartment building, the scratching you hear may be in a shared wall or the floor between units. Mice move through pipe chases, shared basements and the gaps around radiator pipes. If you hear noise in a wall you share and your own kitchen shows no droppings, the nest may be on the other side.

Tell your landlord or neighbor. Treating only one side of a shared wall rarely works for long.

Noises that mean act now

Steady gnawing near outlets, light fixtures or the electrical panel deserves quick attention, because rodents chew wiring. So does gnawing near a gas line or water line. Scratching inside a heating duct is another one. The CDC recommends calling a professional when rodents have gotten into heating or cooling ducts. If you smell something dead after the noise stops, see dead rodent smell.

How to narrow it down

Note the time. Night points to mice or rats. Day points to squirrels.
Note the location. Walls and ceilings throughout the house suggest mice. Basement and lower floors suggest rats. Attic only suggests squirrels or mice.
Look for droppings. Mouse droppings are an eighth to a quarter inch long. Norway rat droppings are about three quarters of an inch. See our rat droppings and mouse droppings guides.
Check outside for burrows along the foundation and for gaps at the roofline.
Set a snap trap along the wall near the noise. What you catch answers the question.

What to do once you know

For mice, trap along the walls where they come out to feed and seal the entry points outside. See mice in walls. For rats, focus on the basement, the foundation and burrows outside. See rat control. If you are still not sure, a rodent inspection will identify the animal and the entry points.

Frequently asked questions

Why do I only hear mice at night?

Mice are most active from dusk until early morning, when the house is quiet and they come out to feed.

Can rats be in the attic in Cleveland?

It is uncommon. Cleveland's Norway rats live at ground level. Attic noise is usually mice or squirrels.

Is scratching in the ceiling mice or squirrels?

If it happens at night and sounds light, mice are likely. If it happens in daylight and sounds like running or rolling, squirrels are likely.

Why did the noise stop suddenly?

The rodent may have moved, been caught or died. If you notice a bad smell a few days later, a dead rodent in the wall is likely.

Should I bang on the wall to scare them?

It may quiet them briefly, but it does not solve anything. Traps at the exits and sealing outside do.

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