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Boxelder Bugs in Olympia Homes: What You Should Know

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If you live in Olympia, you’ve likely seen boxelder bugs. These black insects with red lines gather in big groups in late summer and fall. They don’t bite or damage wood, but they become a problem when they get inside.

Boxelder bugs crowd onto sunny walls, then slip through tiny gaps into attics, basements, and wall voids. Indoors, they hide to overwinter and reappear in spring. In Lacey and across Thurston County, they are common because boxelder and ash trees are nearby.

This guide explains why boxelder bugs invade Olympia homes, the signs to watch for, and how professional pest control helps. We also compare them to other pests so you can choose the proper protection for your home.

Key takeaways

  • In the fall, boxelder bugs gather on sunny siding, then move indoors to find warm spots for winter. They stay hidden until spring.
  • They enter through tiny gaps around windows, doors, and siding, then settle in walls, attics, and basements.
  • They don’t bite, but they can stain fabrics and walls. Large groups feel overwhelming when many appear at once.
  • PCI Pest Control uses safe, effective treatments to protect your home year-round. Our local team is familiar with Olympia’s boxelder bugs and develops a customized plan to prevent repeat infestations.

Why boxelder bugs invade Olympia homes

Boxelder bugs live near boxelder trees and ash trees, feeding on seeds and leaves in summer. When the weather cools, they group on walls and tree bark, then slip into homes for shelter.

Inside, they hide in cracks, crevices, attics, and basements. They do not lay eggs indoors, but large numbers get annoying fast. People often confuse them with stink bugs. Stink bugs smell when crushed. Boxelder bugs mostly leave stains.

Signs of a boxelder bug infestation in Olympia

You may have a boxelder bug infestation if you see:

  • Swarms of bugs on sunny walls in late summer or fall.
  • Bugs crawl into cracks or hide in wall voids.
  • Reddish stains on curtains, clothing, or furniture from crushed bugs.
  • Bugs reappear in spring when temperatures rise.

They don’t spread disease, but they tend to return each year.

Professional pest control for boxelder bugs in Olympia

Olympia’s mild climate and tree cover attract boxelder bugs, so the problem often repeats. Vacuuming and sealing can help, but the results may not last. That’s why many homeowners look for a professional pest management plan.

At PCI Pest Control, we provide lasting boxelder bug control services:

  • Inspection: We check your home for entry points and nearby host trees.
  • Treatment Plan: Our team utilizes safe, approved products to treat active bugs effectively.
  • Exclusion: We seal entry spots and recommend changes to prevent new infestations.
  • Follow-up: Ongoing pest control services keep your home protected through all seasons.

Since we’re local to Olympia and Thurston County, we know precisely how to handle this common pest problem.

Comparing boxelder bugs to other household pests

Boxelder bugs share some habits with other pests, but key differences matter. Here’s a quick comparison:

PestWhat They DoDo They Bite?Do They Damage Homes?Main Concern for Homeowners
Boxelder bugsGather in large numbers, hide indoors in the fall, and leave stains on fabric and wallsNoNoSeasonal invasions that return every year
Stink bugsCluster in large numbers, release foul odor when crushedNoNoStrong smell and indoor swarms
FleasLive on pets and in carpets, bite people and animalsYesNoItchy bites and fast-spreading infestations
Bed bugsHide in mattresses and furniture, feed on blood at nightYesNoPainful bites and hard-to-eliminate infestations
TermitesLive in walls and wood, eat structural timberNoYesCostly property damage if untreated

Boxelder bugs do not bite or damage wood, but large groups make them a top nuisance in Olympia. A professional plan is the most reliable way to keep them out.

Making the right pest control choice for your Olympia home

You don’t have to deal with boxelder bugs on your own. Since 1998, PCI Pest Control has supported local homeowners with trusted, long-lasting solutions. Our experienced team knows Olympia’s pest patterns and helps you keep your home comfortable year-round.

If you’re ready to take control, contact us today to request a free quote to schedule your inspection. 

FAQs

Do boxelder bugs bite or cause damage?

No, they don’t bite or harm structures. They only stain fabrics and walls when crushed, but their numbers make them a significant annoyance.

Can boxelder bugs lay eggs inside my house?

No. Boxelder bugs only lay eggs outdoors on boxelder and ash trees during warm months. Indoors, they only hide to overwinter.

What’s the best way to keep boxelder bugs out?

Seal cracks, fix screens, and trim plants near your home. For long-term results, call PCI Pest Control for a targeted treatment plan.

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Written by Matt Purcell,

I was born and raised in Olympia, WA, which is why I value being a part of this community so much. My favorite part of PCI is the chance to laugh and engage with my employees, and how we work together to continuously strengthen the team. Outside of work I enjoy playing tennis, traveling, and riding motorcycles