Silverfish in Irish Teen's Bedroom: Not the Biter—Identify the Real Culprit

The "big, black/grey, teardrop-shaped, narrow" bug that bit your arm is not a silverfish. Silverfish (and firebrats) do not bite. They're scavengers of starch, paper, glue—harmless to people.

What Bit You?

Unknown. Could be a spider, mosquito, midge, or other insect. The silverfish you photographed is a bystander.

Silverfish Control (If Desired)

• Reduce humidity (dehumidifier, ventilation).
• Diatomaceous earth in cracks.
• Boric acid bait stations.
• See livingwithbugs.com/silverfish_firebrats.html.

Next Step

If you get bitten again, capture the biter (tape, vial) and photograph it clearly. Post the image for ID. Don't assume the most visible bug is the culprit.