Olympia Occasional Invaders
Boxelder Bugs, Western Conifer Seed Bugs, Lady Bugs & Brown Marmorated Stink Bugs
These occasional invaders can be found inside or around homes and businesses in Olympia and nearby areas. Their scientific names are Boisea trivittata (boxelder bug), Leptoglossus occidentalis (western conifer seed bug), Harmonia axyridis (lady bug), and Halyomorpha halys (brown marmorated stink bug).
These pests do not harm your home’s structure, but large numbers may cause discomfort or alarm. Localized treatments are available when these bugs become a nuisance. The team at Venables Pest Management also offers advice on practical steps to reduce their presence and discourage their return.
A treatment in late August or September, before these pests enter the structure to overwinter is the most effective means of control.
Contact us at (360) 523-1339 or use our online form to get a free estimate.
Understanding Olympia’s Occasional Invaders
Boxelder Bugs (Boisea trivittata)
Most active in fall as temperatures drop, boxelder bugs gather in large groups on sunny walls, windows, and trees, especially near boxelder and maple trees common to the Pacific Northwest. They don’t bite or damage structures but can stain surfaces and become a nuisance indoors.
Western Conifer Seed Bugs (Leptoglossus occidentalis)
Native to the coniferous forests around Olympia, these bugs often enter homes in the fall to overwinter. They feed on pine cones and seeds but do not cause damage to homes. Their size and appearance can startle homeowners, but they pose no threat to people or property.
Lady Bugs (Harmonia axyridis)
Lady bugs, also known as the Asian lady beetle, are commonly recognized and welcomed in gardens for their role in controlling aphids. However, during colder months, these lady bugs often cluster inside walls, attics, and other sheltered areas. Their indoor presence can sometimes lead to yellow stains and unpleasant odors.
Brown Marmorated Stink Bugs (Halyomorpha halys)
An invasive species spreading through Washington, these stink bugs emit a strong odor when disturbed. They commonly enter homes in large numbers during the cold season and feed on fruits and plants outdoors. Indoors, their presence is mainly a nuisance.
Seasonal Patterns & Behavior in Olympia, WA
These pests follow seasonal trends shaped by the Pacific Northwest climate. In late summer and fall, they seek warmer shelter, often entering homes through small cracks, vents, or gaps around windows and doors. During winter, they stay hidden in wall voids, attics, or basements, emerging again in spring. Understanding these patterns supports practical management of their presence.
Why Focused Attention is Needed for These Pests
Olympia’s proximity to forests, waterways, and parks means many homes and businesses are near the natural habitats of these insects. Thurston, Lewis, and Mason counties regularly experience occasional invaders, especially during seasonal changes. Weather, local vegetation, and urban development encourage these bugs to seek shelter indoors.
Additional Tips to Minimize Occasional Invaders
- Seal cracks and gaps around windows, doors, and foundations
- Maintain screens on vents and other openings
- Clear debris and leaf piles near your home’s base
- Store firewood away from buildings
These steps make your property less appealing to bugs looking for winter refuge.
How Venables Pest Management Helps Manage Occasional Invaders
We follow Integrated Pest Management (IPM) principles customized for Olympia’s environment and your property’s needs:
- Detailed inspections to locate entry points and breeding sites
- Targeted, low-impact treatments that minimize risk to children, pets, and beneficial insects
- Recommendations for sealing gaps
- A treatment in the late summer/early fall, before these pests enter a home’s structure to overwinter is most effective.
Our approach balances pest reduction with environmental respect.
We assist residents and businesses in managing occasional invaders with practical, effective solutions. Call (360) 523-1339 for advice or service to maintain comfort at your property year-round.
Why Choose Us?
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Excellent Customer ServiceWe prioritize your satisfaction, going above and beyond to exceed your expectations with every interaction.
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20+ Years ExperienceYou can trust our extensive expertise to deliver proven methods and reliable pest control solutions.
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Customized Treatment PlansTailoring solutions to your unique needs ensures effective and lasting results.
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Family Owned & OperatedOur commitment to treating your home like our own sets us apart.
Our Customers Say It Best
At Venables Pest Management, your satisfaction is our priority! See for yourself what our customers have to say about working with us.
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"Very Professional & Thorough"These people are very professional and thorough.Heather S.
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"Great Service & Knowledgeable Staff"Great service with a knowledgeable staff.Jill A.
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"Friendly, Prompt & Thorough"Friendly, prompt and thorough. They are very very reasonable.Lisa W.
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"Consistently Great Customer Service, Always Punctual & Friendly"Provides consistently great customer service, always punctual, friendly, and on top of keeping the critters away!Pam Pratt