Tiny Bug is Household Casebearer

A readers found this tiny creature in his bathroom:

household casebearer

UPDATE! All About Worms has partnered with HealthLabs so that
you can get tested for parasites at a fully-qualified lab near you,
no doctor's visit required
! Check it out at HealthLabs.com!

He hopes we can provide some information about it. We recognize this creature as the larval form of the Phereoeca uterella moth. This species was once known by its nickname “plaster bagworm”, however its now called the “household casebearer.” Most don’t even see the larva when they spot this species, they simply notice the case or shell that surrounds it. In the photos our reader sent, you can just make out the head of the larva peeking out of the brown case. These larvae have dark brown heads, white bodies, and three pairs of well developed legs.

Larvae construct their cases during the first larval stage, which is known as the 1st instar.  The case is originally made of silk that the larva secretes. The inside of the case is completely lined with silk, and its shape provides a safe home that the larva can move around in. The outside of the case collects tiny particles of sand, dust, dirt, arthropod remains, and other fibers. During each successive larval stage, more particles attach to its case, and it grows with the larva. As the larva gets bigger, it drags the case behind it.  When it has reached its final larval stage and is ready to pupate, the larva walks up a vertical surface and attaches its case to the wall with secreted silk. The pupation occurs within the case, which the larva modifies for this process. After pupation, a moth emerges from the case!

Household casebearers can be household pests, but you can install an air conditioning unit to keep cool air flowing to keep these creatures at bay. In addition, clean to eliminate particles that contribute to the cases these larvae build.

No Paywall Here!
All About Worms is and always has been a free resource. We don't hide our articles behind a paywall, or make you give us your email address, or restrict the number of articles you can read in a month if you don't give us money. That said, it does cost us money to pay our research authors, and to run and maintain the site, so if something you read here was helpful or useful, won't you consider donating something to help keep All About Worms free?
Click for amount options
Other Amount:
What info did we provide for you today?:

To sum up, one of our readers sent us a photograph of a household casebearer. The larvae build mini homes for themselves until they are ready to mature into moths!

 

 

Summary
Article Name
Tiny Bug is Household Casebearer
Description
one of our readers sent us a photograph of a household casebearer. The larvae build mini homes for themselves until they are ready to mature into moths!
Author

Leave a Comment (but to submit a question please use the "Submit a Question" link above; we can't respond to questions posted as a comment)

Menu / Search

All About Worms