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What are these red and black bugs in my house?

Ehrlich Answers

"These tiny red and black bugs keep showing up in my house. What kind of bug could they be?"

When you spot a tiny red and black bug in the house, it’s often a boxelder bug or a similar species like the milkweed bug. These insects are identified by their dark bodies and bright red or orange markings. They appear in large groups, especially in the fall when they move indoors looking for shelter.

If you’ve noticed small black and red bugs in the house, some of the common culprits could include:

  • Boxelder bugs – black bodies with red lines along their wings
  • Milkweed bugs – red or orange bodies with black markings
  • Other red and black beetles – less common indoors but sometimes seen

If you’ve noticed black and red bugs all over the house, they’re likely gathering on sunny walls for warmth. While these pests don’t bite or damage property, their large numbers can be a nuisance, and they may stain surfaces when crushed.

A swarm of milkweed bugs on a milkweed pod
Milkweed bugs
A large group of boxelder bugs on a wooden fence
Boxelder bugs

We can help identify and remove bugs and insects

Even if these bugs are largely harmless, you still don’t want them swarming all over your property. That’s where our local technicians can help. We’ll not only help with identification so we know exactly what you’re dealing with, but we’ll help figure out why they’re coming into your home, remove them, and help prevent them from getting inside in the future.

You can book a free inspection, and we’ll come and give you a free estimate.

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