You are here:

Pests/Black beetle found in furnace

Advertisement


Question
Black bug
Black bug  
We were having our air ducts cleaned and the technician discovered these black bugs behind the face plate. He says he's never seen any bugs in a furnace before. We thought they were dead because they were moving but then when touched these things moved. We sanitized our whole system now bc we have no idea where they came from. Unfortunately I found one on the floor this morning. Are these dangerous? Should we get an exterminator?

Answer
Patty,

This could be a click beetle (Elateridae) but the image is a bit too fuzzy to be certain. These are not usually found indoors so it is a mystery how they got there. They are harmless and no reason to treat. Your best option is probably to collect a few and take them to your county Cooperative Extension office for identification (or UC Davis/UC Riverside if closer) - check www.extension.org.

Jack DeAngelis

Pests

All Answers


Answers by Expert:


Ask Experts

Volunteer


Jack DeAngelis

Expertise

I can answer questions in any area of entomology (study of insects, spiders, mites, ticks, and other terrestrial arthropods). Contact me about home and garden insects such as aphids and spider mites, insects that bite and sting such as ticks and wasps, and insects that damage homes such as carpenter ants and termites.

Experience

20 years as university extension entomologist, now retired; currently publish a website about home and garden insects.

Organizations
see www.livingwithbugs.com/resume.html

Publications
see www.livingwithbugs.com/resume.html Fine Gardening magazine

Education/Credentials
Ph.D. in Entomology (the study of insects)

Awards and Honors
see www.livingwithbugs.com/resume.html

©2016 About.com. All rights reserved.