Rat Droppings Identification

Rat droppings are roughly half an inch to three quarters of an inch long, cylindrical and dark when fresh, according to NC State Extension. Norway rat droppings tend to have rounded, blunt ends, while roof rat droppings tend to be more pointed. Rats leave about 30 to 50 a day, often in small clusters along their runways.

In Asheville, rat droppings almost always come from Norway rats, which live low: in crawl spaces, basements, garages, under decks and along foundations. If you find them, do not sweep or vacuum. Wet them with disinfectant, wipe them up with gloves on and start looking for the burrows and gaps.

What rat droppings look like

Size: about half an inch to three quarters of an inch long, noticeably bigger than mouse droppings.
Shape: cylindrical, like a capsule. NC State Extension notes Norway rat droppings are typically more rounded on the ends, and roof rat droppings pointier.
Color: dark brown to black when fresh, turning gray and dry with age.
Pattern: often in groups along runways and near food, rather than scattered one by one.
Bait colors: droppings can take on the color of rodent bait if rats have been eating it.

Next to a coin in a photo, a rat dropping is about the length of a dime's diameter or longer. A mouse dropping is much shorter.

Norway rat or roof rat?

The Mammals of North Carolina guide describes the roof rat as rare and local across most of the state and much less common than the Norway rat. So in Asheville, assume Norway rat unless the evidence points elsewhere.

Location helps confirm it. Norway rats live low and leave droppings in crawl spaces, basements, garages, under porches and decks, and near burrows along the foundation. Roof rats travel high and leave droppings in attics, along rafters and on top of walls. If you find rat-size droppings only in the attic, mention it on the call so the technician checks carefully.

Where to look around an Asheville home

The crawl space, especially near the access door, along the sill plate and around pipes.
The basement, behind stored boxes and along walls.
The garage, near trash cans, birdseed, pet food and stored items.
Under decks and porches, and around sheds.
Near trash carts, compost bins, chicken coops and bird feeders.
Lower kitchen cabinets and under sinks, where rats come up through pipe holes.
Along creek banks and retaining walls at the edge of the yard.

Look for burrows too: smooth holes about the width of a fist, often with fresh dirt fanned out. Dark rub marks along walls and beams show regular routes.

Think it might be rats?

Your call goes to an independent rodent control provider serving Asheville and Buncombe County. Describe what you are seeing and ask for the plan and the price in writing before any work starts.

(828) 503-0038Tap to call · Free to call

Cleaning up safely

The CDC's steps for rodent droppings are the same for rats and mice: air the space out for 30 minutes, wear gloves, soak the droppings with a fresh bleach solution of one and a half cups of bleach per gallon of water for five minutes, wipe them up with paper towels and bag the waste, then disinfect again and wash your hands. Do not sweep or vacuum.

Rats also carry leptospirosis, which the CDC says spreads through the urine of infected animals and can survive in water or soil for weeks to months. Wear gloves and avoid touching wet areas around droppings with bare hands. See rodent diseases.

What to do next

Finding rat droppings means rats are using that space. The next steps:

1. Find the burrows and runways outside. 2. Cut off food: closed trash carts, birdseed and feed in metal bins, compost in a closed bin. 3. Trap with rat-size traps on the runways. NC State Extension notes mouse traps are not effective for rats. 4. Seal gaps of half an inch or more, and a quarter inch where young rats travel.

See how to get rid of rats in Asheville for the full plan, or rat control if you want a technician to handle it.

What the number and spread of droppings tell you

A few droppings in one spot in the garage or crawl space can mean a single rat passing through. Droppings along a wall in a line, with rub marks and gnawing, mean an established runway. Droppings in several places, plus burrows outside and noise at night, mean a colony.

Fresh droppings in a spot you cleaned a day or two earlier mean rats are still active. Mark or photograph what you find before cleaning so the technician can see the pattern. See rat control in Asheville.

Frequently asked questions

How big are rat droppings?

About half an inch to three quarters of an inch long, according to NC State Extension, compared with a quarter to half an inch for mice.

Are rat droppings in Asheville from roof rats?

Rarely. The Mammals of North Carolina guide calls roof rats rare and local across most of the state. Norway rats are the usual source.

Is it safe to touch rat droppings?

Do not touch them with bare hands. Wear gloves, soak them with disinfectant and wipe them up as the CDC recommends.

Rat droppings in my attic only. What does that mean?

It could mean Norway rats climbing inside walls, or less often a roof rat. Mention it on the call so the technician checks the roofline and the wall paths.

Can rat droppings tell me how many rats there are?

Not exactly. Rats leave about 30 to 50 droppings a day, according to NC State Extension, so a lot of droppings can come from a few rats. Spread, freshness and burrows outside give a better picture.

Get a rodent technician on the phone

Free to call. You are connected with an independent provider serving Asheville and the rest of Buncombe County. Same-day appointments are often available.