You spot a small pile of what looks like sawdust on a window sill, near a baseboard, or under a piece of furniture, and you are not sure where it came from. If those granules are termite droppings, also called frass, drywood termites have been feeding in the wood nearby. Here is how to tell what you are looking at and what to do about it.
Termite Droppings: What They Actually Look Like
Termite frass consists of tiny, hard pellets about one millimeter long. Each pellet is oval-shaped with six slightly concave sides and rounded ends, giving it a distinctive hexagonal cross-section visible under a magnifying glass. That six-sided shape is what separates drywood termite waste from sawdust, sand, or debris from other pests.
Color
Color varies by the wood being consumed. Pellets from termites feeding on pine tend to be lighter tan or cream. Those produced while feeding on oak or darker hardwoods run medium brown to nearly black. A single pile often contains mixed colors because termites move through different layers or wood types as they tunnel.
Texture
In texture, frass is dry and granular and does not smear when pressed between fingers. Homeowners often describe small piles as resembling ground pepper, coffee grounds, or fine sand, though the uniform six-sided shape distinguishes frass from all three.
Where to Look for Termite Frass
Drywood termites push their droppings out of small openings in wood called kick-out holes. Because gravity pulls the pellets straight down, frass collects on horizontal surfaces directly below the infested wood. Common spots include:
- Window sills and door frames
- Wooden baseboards and floor moldings
- Hardwood floors near walls
- Attic joists and ceiling edges
- Wooden furniture surfaces
- Garage shelving and exposed beams
If you find frass, inspect the surface directly above it. The kick-out hole will look like a tiny pinhole in the wood. New frass continuing to appear after you clean the pile is a reliable sign the infestation is still active.
Drywood vs. Subterranean Termites: Different Evidence
Frass piles only come from drywood termites. Knowing that distinction matters before you call anyone.
Drywood Termites
Drywood termites live entirely within the wood they infest and keep their galleries clean by pushing pellets out through kick-out holes. Frass is often the first visible sign of their presence and one of the clearest available before structural damage becomes apparent.
Subterranean Termites
Subterranean termites live underground and travel through mud tubes to reach wood above the soil. They incorporate their waste into tube material rather than expelling loose pellets. If you have subterranean termites, you will find pencil-width mud tunnels along foundation walls, crawl space framing, or slab edges. The University of Kentucky Entomology Department notes that subterranean infestations can go undetected for years because termites tunnel inside wood while leaving the outer surface intact.
How to Tell Termite Frass Apart from Similar Debris
Termite pellets are easy to confuse with several common look-alikes.
Termite Frass vs. Sawdust
Sawdust consists of irregular wood fibers and slivers with no consistent shape. Termite frass is uniform and compacted. Under a magnifying glass or phone camera, sawdust lacks the six-sided geometry of frass pellets.
Termite Frass vs. Carpenter Ant Debris
Carpenter ant frass looks coarser and contains mixed material, including wood shavings, insect body parts, and other debris. Carpenter ants excavate wood but do not eat it, so what they push out is rougher and more varied. Termite frass contains no insect fragments.
Termite Frass vs. Rodent Droppings
Rodent droppings are larger, softer, and often taper to a point. They smear under pressure and typically have a noticeable odor. Termite pellets are hard, dry, and odorless.
If a visual check is not enough, press a few pellets between your fingers. Termite frass tends to crumble into a fine powder. Carpenter ant debris feels coarser and more fibrous. Neither test is definitive, but both can help narrow down what you are looking at.
Other Termite Signs Worth Checking
When you spot frass, check the surrounding area too. Other evidence is often nearby:
- Tiny pinholes in wood surfaces close to where the pellets collect, which are the kick-out holes termites use to expel frass
- Matched pairs of discarded wings near windows or doors, left behind by swarmers after landing
- A hollow or papery sound when you tap wooden surfaces, which suggests feeding damage inside
- Pencil-width mud tunnels along the foundation or crawl space, pointing to subterranean rather than drywood activity
- Paint bubbling or peeling from walls without an obvious cause, which can indicate moisture trapped inside damaged wood
Any combination of these signs warrants a professional inspection. The EPA’s termite identification guide notes that termites are cryptic pests and that even experienced inspectors can miss signs hidden behind walls or insulation.
What to Do When You Find Termite Droppings
Do not sweep or vacuum the frass pile right away. Leaving it in place gives a technician a better chance to confirm the species, locate the kick-out hole, and assess the scope of the problem. Photograph the pile and the area around it before anything is disturbed.
Avoid spraying the area with household pesticides. Over-the-counter products rarely reach termites deep inside wood, and applying them before an inspection can complicate the treatment picture. Schedule an inspection so a technician can confirm what you are seeing, identify the species, and check areas of your home that are not visible from the surface.
ClearDefense Pest Control technicians start by inspecting mud tubes, wood damage, crawl spaces, door frames, and other entry points, then build a treatment plan based on what they find. For subterranean termites, that includes bait placement around the foundation. After every visit, you receive a Defense Report listing what was inspected, what was treated, and every product used by name, active ingredient, and EPA registration number.
Get a Termite Inspection from ClearDefense
If you have found what looks like termite droppings, or any other sign of termite activity, get an inspection before the picture changes. ClearDefense Pest Control offers same-day termite control with local technicians who document every visit. Schedule through cleardefensepest.com or call your local office directly.
Frequently Asked Questions
Are termite droppings dangerous to touch?
Termite frass is not considered toxic, and brief contact poses no documented health risk for most people. Wash your hands after handling it. Frass is a sign of active wood damage, so do not dispose of it before a professional inspection. The pile helps the technician identify the species and locate where the feeding is happening.
Can termite droppings reappear after cleaning?
Yes. If the infestation is active, new frass will appear in the same spot within days of cleaning. Recurring piles are among the clearest signs that termites are currently feeding. If you have cleaned a spot twice and the pellets return, schedule an inspection.
Do subterranean termites leave droppings?
No. Subterranean termites use their waste as a binding material in mud tubes and do not expel pellets. If you are dealing with subterranean activity, look for mud tubes along your foundation or crawl space walls, not piles of frass on the floor.
How small are termite droppings?
Each pellet is roughly one millimeter long, about the size of a grain of coarse sand. Piles build up gradually beneath kick-out holes until they become noticeable. A magnifying glass or your phone’s zoom camera will help you confirm the six-sided shape that distinguishes frass from other debris.
What should I do if I am not sure whether I have found termite droppings?
Photograph the pile and the surface directly above it, then contact a licensed pest control company for an inspection. Self-treating before identification can mean missing an active infestation entirely. A trained technician can confirm the species and check areas that are not accessible from the surface.
