If you’ve ever spotted clusters of black and red insects clinging to the side of your house or swarming near your windows, you’ve likely encountered boxelder bugs. These pests, often confused with other types of little red bugs, tend to show up in large numbers during the warmer months and can be a major nuisance. But the real question is: Are boxelder bugs a threat?
This article breaks down what you need to know about boxelder bugs—how they behave, what kind of damage they can cause, and how to manage them effectively.
What Are Boxelder Bugs?
Boxelder bugs (Boisea trivittata) are a common nuisance pest found across much of the United States. They are named after the boxelder tree, one of their primary food sources. These insects are about half an inch long and are easily recognizable by their black bodies with striking red or orange markings.
Boxelder bugs primarily feed on seeds and leaves of boxelder trees, maples, and ash trees. During the warmer months, they live and reproduce outdoors. However, as the weather cools, they seek warmth and shelter—often inside homes.
Are Boxelder Bugs Dangerous?
The good news: boxelder bugs are not considered dangerous. They don’t bite, sting, or transmit diseases. They also don’t cause structural damage to homes like termites or rodents. However, they can still pose a few problems:
1. Nuisance Factor
Boxelder bugs are prolific. When they invade in large numbers, they can become a serious annoyance. They cluster on sunny exterior walls, windows, and doors, and may find their way inside through cracks or gaps in your home’s foundation.
2. Staining Surfaces
While they don’t chew on wood or fabric, boxelder bugs can leave behind a reddish-orange stain when crushed. This secretion can damage curtains, walls, furniture, and other household items.
3. Odor
Like many true bugs, boxelder bugs release a pungent odor when disturbed or squished. This odor is a defense mechanism, but it can make dealing with an infestation unpleasant.
Why Are Boxelder Bugs in My House?
Boxelder bugs typically invade homes in the fall, looking for a warm place to overwinter. They are attracted to warm, sunny areas—especially buildings with southern or western exposure. Common entry points include:
- Gaps around windows and doors
- Vents and chimneys
- Cracks in siding or foundation
- Attic or basement openings
Once inside, they may remain dormant through the winter but become active again in spring.
Are They Harmful to Plants or Pets?
In small numbers, boxelder bugs don’t cause significant harm to trees or plants. However, large populations can stress young trees by feeding on leaves and developing seeds. They’re not toxic to pets, but their presence can still be a nuisance, especially if pets like to chase or eat bugs.
How to Prevent a Boxelder Bug Infestation
Preventing a boxelder bug infestation is often more effective than trying to remove one. Here are a few proactive steps you can take:
1. Seal Entry Points
Inspect your home for potential entryways. Caulk cracks, seal gaps around windows and doors, and install screens on vents and chimneys.
2. Use Insect Repellent Barriers
Professional-grade insecticides applied around the perimeter of your home can help deter boxelder bugs from entering.
3. Manage Landscaping
If you have boxelder trees or maples near your home, consider trimming them back. Removing female boxelder trees (which produce seeds) can also reduce the local population.
4. Vacuum Instead of Crushing
If boxelder bugs do get indoors, vacuum them up instead of crushing them to avoid stains and odor.
What to Do if You Already Have an Infestation
If you’ve already found boxelder bugs inside your home, it’s important to act quickly to minimize the problem. Here are a few tips on how to get rid of boxelder bugs:
- Use a vacuum to collect visible bugs
- Install door sweeps and weather stripping to close off entry points
- Apply insecticidal dust to wall voids where they might be hiding
- Use a professional pest control service for large infestations
While boxelder bugs don’t pose a serious health threat, a professional team can ensure that they’re removed efficiently and help prevent future problems.
Professional Pest Control Solutions
Although boxelder bugs are mostly a nuisance, recurring infestations or large numbers indoors can be overwhelming. This is where professional pest control Leavenworth KS services come in handy.
Experts can identify nesting sites, seal entry points, and apply safe, effective treatments that target boxelder bugs at every stage of life. More importantly, professionals offer peace of mind—ensuring your home stays bug-free all year long.
Are Boxelder Bugs a Threat to Your Home?
In summary, boxelder bugs aren’t dangerous in the traditional sense. They don’t harm humans or pets directly, and they’re not destructive like other pests. However, they can still be a major inconvenience—especially when they show up in large numbers and invade your home.
With a combination of preventative measures and professional help, you can protect your home from these seasonal intruders. Whether you’re dealing with a current problem or want to prevent one in the future, it’s always smart to consult with a reliable pest control Leavenworth provider.

About Kansas City Pest Control
Kansas City Pest Control offers effective and eco-conscious pest solutions for homeowners in Leavenworth, KS and the surrounding areas. Our services include treatment for insects like boxelder bugs, ants, spiders, bed bugs, and more. Whether you’re dealing with seasonal invaders or year-round nuisances, our skilled team is here to help. Learn more about our pest control plans and how we can help protect your property by visiting our website today.