About Boxelder Bug
A black and red bug that forms large aggregations on and around boxelder trees in autumn. It is commonly seen warming itself on sunny building walls before entering structures to overwinter. It is harmless but considered a nuisance pest.
Did You Know?
Thousands of individuals can aggregate on the south-facing walls of buildings on warm autumn days, creating dramatic displays before entering homes to overwinter in wall voids.
How to Identify Boxelder Bug
Boxelder Bug (Boisea trivittata) belongs to the order Hemiptera, family Rhopalidae. Adults typically measure 11-14 mm.
Boxelder Bug Habitat
Boxelder Bug is found in underground habitats, particularly across North America. This species has adapted to thrive in its preferred environment, where it can find suitable food sources and shelter.
Boxelder Bug Diet and Feeding
Boxelder Bug feeds on plant sap by piercing stems and leaves with specialised mouthparts. Sap feeders extract nutrients directly from the plant's vascular system.
Where Is Boxelder Bug Found?
Boxelder Bug can be found in North America, where it inhabits underground environments. Its distribution is influenced by climate, food availability, and habitat suitability.
Distribution Map
Where Boxelder Bug can be found
Is Boxelder Bug Dangerous?
Boxelder Bug is generally harmless to humans. It does not bite or sting and poses no significant health risk. Like most insects, it prefers to avoid human contact and will typically flee rather than confront a perceived threat.
Boxelder Bug Role in Nature
Boxelder Bug is part of the food web as a primary consumer, feeding on plant material. It serves as an important food source for birds, bats, amphibians, and other insectivores, connecting plant energy to higher trophic levels.
Seasonal Activity
Frequently Asked Questions About Boxelder Bug
What does Boxelder Bug look like?
The Boxelder Bug typically measures 11-14 mm.
Where is Boxelder Bug found?
The Boxelder Bug is found in North America and typically inhabits underground environments.
What does Boxelder Bug eat?
The Boxelder Bug feeds on plant sap by piercing stems and leaves.
Is Boxelder Bug dangerous to humans?
The Boxelder Bug is generally harmless to humans. It does not bite or sting and poses no significant health risk.
What is an interesting fact about Boxelder Bug?
Thousands of individuals can aggregate on the south-facing walls of buildings on warm autumn days, creating dramatic displays before entering homes to overwinter in wall voids.
Cite This Page
APA:
InsectDiscover. (2026). Boxelder Bug (Boisea trivittata). Retrieved from https://insectdiscover.com/insect/boxelder-bug
MLA:
"Boxelder Bug." InsectDiscover, https://insectdiscover.com/insect/boxelder-bug.