Species guide
Boxelder bug
Nuisance, not harmfulBoisea trivittata
How to recognise it
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 it 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 to do
Seal entry points and vacuum up any that get inside.
Recorded 39,098 times in the wild worldwide.
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