Webspinners swarming around lights

Subject:  Swarming around lights inside
Geographic location of the bug:  California’s Central Coast
Date: 08/06/2018
Time: 01:54 AM EDT
Your letter to the bugman:  For the last several days a few of these bugs have been showing up inside our house. This evening, a huge group was swarming every light we had on. Can you tell me what this is? We have screens on all of our windows, so I’m concerned about how they are getting in. Appreciate your help if you can share any info. Thanks!
How you want your letter signed:  Amy


Dear Amy,
This is a benign Webspinner in the insect order Embiidina, and you have already discovered what BugGuide remarks:  “winged males of some species come to lights.”  BugGuide also notes:  “rapid runners, often run backwards; live in colonies (in galleries of spun silk) and exhibit limited maternal care for eggs and young.”  We don’t provide extermination advice, but you can try dimming the lights, keeping lamps away from windows and checking the screens for access points.

Webspinners Swarming Around Light
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BugMan aka Daniel Marlos has been identifying bugs since 1999. WhatsThatbug.com is his passion project and it has helped millions of readers identify the bug that has been bugging them for over two decades. You can reach out to him through our Contact Page.

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