Boxelder Bugs
Boxelder bugs are black and red-orange insects that feed on boxelder, maple, and ash trees during summer and invade structures in large numbers in fall to overwinter. They aggregate on sun-warmed exterior walls before entering through gaps and crevices, and they can appear in staggering numbers - thousands on a single structure. They are found across the United States wherever their host trees grow. While completely harmless, their sheer numbers and habit of emerging indoors on warm days make them one of the most complained-about fall and winter pests.
Species in This Group (1)
Key Behaviors
Boxelder bugs feed on seeds of boxelder, maple, and ash trees in spring and summer. In fall, they aggregate on south and west-facing walls and enter structures to overwinter. They cluster in wall voids, behind siding, and in attic spaces. On warm winter and spring days, they emerge into heated rooms. They do not reproduce indoors and return outdoors in spring. Properties near female boxelder trees experience the heaviest pressure.
Risks & Concerns
Boxelder bugs do not bite, sting, or cause structural damage. They can stain curtains, walls, and fabrics with their excrement. Their overwhelming numbers when they invade structures create significant homeowner distress. Dead bugs accumulate in wall voids, light fixtures, and on window sills. Removing nearby female boxelder trees significantly reduces populations on affected properties.
Need Help With Boxelder bugs?
If you're seeing signs of boxelder bugs in or around your home, professional treatment is the fastest way to stop the problem. Lotus Pest Control offers free inspections to identify the issue and recommend the right solution.