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University of Minnesota Extension

Extension > Garden > Diagnose a problem > What insect is this? > Insects found indoors > Beetles, bugs, ants, and other insects without obvious wings - Larger than 1/4 up to 1/2 inch long > Firebrat

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Jeff Hahn

Size: 1/4 - 1/2 inch long

Where/When: Found indoors in warm, damp, dark places throughout the year. Often associated with boiler and furnace rooms, steam tunnels, insulation around hot water or heating pipes, but can be found in many rooms in homes.

Significance: Mostly a nuisance. They may damage paper.

More information on Firebrats...

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