Pest Library · Termites
Drywood Termites
Incisitermes minor
Wood-dwelling termites that don't need soil — endemic to coastal OC framing, with fall swarms.
Workers 3/8 inch; swarmers ~1/2 inch
Cream workers; reddish-brown swarmers
High (structural damage to attic & wood)
Year-round in wood; swarm September–November
Drywood termites live entirely inside the wood they consume — no soil contact required — which is why they colonize attic framing, eaves, window and door frames, and wood trim across coastal-influenced Orange County. Fall swarms (September–November) are when most homeowners notice them. Treatment is either localized (for contained pockets) or full-structure fumigation (for widespread activity).
What drywood termites look like
Drywood termite workers are about 3/8 inch, cream-colored, with hard heads. The reproductive swarmers most homeowners actually see are about 1/2 inch, reddish-brown, with smoky-gray wings of equal length that shed readily on windowsills, in spider webs, and on hard floors after a swarm. Straight body, straight bead-like antennae, equal-length wings — the same distinguishing features as other termites versus ants.
The single most reliable on-structure sign is frass: six-sided, hard, granular fecal pellets the size of coarse sand, often in small piles below kick-out holes in infested wood. Pellets are diagnostic and they're how most homeowners first discover an active drywood infestation.
Where you'll find drywood termites in Orange County homes
Drywood termites are endemic within roughly ten miles of the coast and are essentially routine in older Orange County housing — attic framing, eaves, window and door frames, and wood trim are all prime habitat. The historic Old Towne Orange district, the older cores of Placentia and Fullerton, and the early-1900s housing throughout the route show extensive activity over decades.
Fall is when drywoods become visible. Swarms occur September through November and produce the windowsill wing piles and pellet piles that drive most discovery calls. Activity continues year-round inside the wood — the swarm is just the visible event.
Signs of a drywood termites infestation
- 01Six-sided, sand-grain-sized fecal pellets (frass) in small piles below wood members
- 02Fall swarms of reddish-brown winged termites, especially after warm days
- 03Discarded equal-length wings on windowsills, floors, and in spider webs
- 04Small kick-out holes (1–2 mm) on the surface of infested wood
- 05Hollow-sounding wood when tapped, particularly in attic framing and door/window trim
Health and property risks
Drywood termites cause progressive damage to non-structural and structural wood — attic framing, eaves, trim, window and door frames — and a long-running colony can produce hidden damage that materially affects the integrity of affected members. Damage is often more localized than subterranean damage but harder to detect because there are no soil tubes.
For OC real estate transactions, drywood activity in older homes is essentially expected and the report distinguishes between current Section 1 findings (active damage) and Section 2 conducive conditions. Lenders require Section 1 clearance before funding most loans.
When to call a professional
Don't DIY termites. Any frass pile, swarm event, or kick-out hole warrants a licensed inspection — both to confirm species (drywood vs. subterranean) and to determine extent and access, which dictates the right treatment method. Misdiagnosing the species or the extent leads to under-treatment and continued hidden damage.
How Trident treats drywood termites
Trident treats drywood termites under California Structural Pest Control Board License #PR8662 with localized treatment for contained, accessible pockets or full-structure fumigation when activity is widespread through inaccessible framing. We match method to the actual finding — and coordinate Section 1 clearance documentation for escrow when our treatment clears the original findings.
Full termite control service detailsCities where drywood termites pressure is highest
These are the OC cities on our route where this specific pest shows up most often, based on local conditions.
Old Towne's 1900s–1920s craftsman and Victorian stock, mid-century tracts, and newer East Orange hillside builds.
Old Town Placentia's early-1900s stock and citrus-era bungalows alongside extensive 1960s–1980s tract development.
One of OC's widest housing spreads — 1900s–1920s historic homes, dense student-rental areas near CSUF, mid-century tracts, and north Fullerton hillside.
Common questions about drywood termites
Commonly confused or related
Subterranean Termites
Reticulitermes hesperus
Soil-dwelling termites that build mud tubes from the ground into wood — driven by foundation moisture in OC.
Roof Rats
Rattus rattus
Sleek climbing rats that enter homes through the roofline — the dominant rat of Orange County's mature-canopy neighborhoods.
Brown Widow Spiders
Latrodectus geometricus
Lighter cousin of the black widow — now widespread in Orange County's suburbs and arguably more common than black widows.
Dealing with drywood termites now?
Send a photo and a description with your quote request — identification is part of every job, and the right treatment depends on getting it right.