Species guide
Boxelder bug
Nuisance, not harmfulBoisea trivittata
What does Boxelder bug look like?
A black bug about 1.3 cm with three red-orange lines on the shield behind the head and red edges on the folded wings. Congregates on warm, sunny walls in autumn.
Is Boxelder bug dangerous?
Harmless — it doesn't bite, sting or damage the home. It can leave a reddish stain if crushed and may smell when disturbed.
What should I do about Boxelder bug?
Seal entry points and vacuum up any that get inside.