Currently viewing the category: "Clothes Moth and Meal Moth Caterpillars"
What's That Bug? does not endorse extermination

Subject: catfood insects
Location: North central Florida
March 27, 2016 5:52 am
Hi, lately I’ve noticed some kind of insect or something around the catfood bowl. They arrange around a solitary piece of catfood in a flower petal fashion. At first I thought some type of silverfish, but these don’t have any noticeable antennae or feet. I thought they must move extremely slowly, but recently I noticed some move. They appear to gather around a piece of wayward dry catfood for days. When I first saw them, they were completely around a piece of catfood and it looked like (from a distance) a plastic flower or something, so I picked one of them up. They almost cotton-like to the touch. Any ideas?
Signature: //Dan

Case Bearing Moth Larvae eating cat food.

Case Bearing Moth Larvae eating cat food.

Dear Dan,
We are amazed that the organized manner in which these Case Bearing Moth larvae are eating cat food.

What's That Bug? does not endorse extermination

Subject: What is this?
Location: Rancho Bernardo, San Diego, CA
January 31, 2016 12:39 pm
I have found a few of these in my home.
What are they.
Signature: Dave Douthett

Case Bearing Moth Larva

Case Bearing Moth Larva

Dear Dave,
This is a Household Casebearer,
Phereoeca uterella, a common household pest.  According to BugGuide:  “The larval case is silk-lined inside and open at both ends. The case is constructed by the earliest larval stage (1st instar) before it hatches, and is enlarged by each successive instar. In constructing the case, the larva secretes silk to build an arch attached at both ends to the substrate. Very small particles of sand, soil, iron rust, insect droppings, arthropod remains, hairs and other fibers are added on the outside. The inside of the arch is lined exclusively by silk, and is gradually extended to form a tunnel, while the larva stays inside. The tunnel is closed beneath by the larva to form a tube free from the substrate, and open at both ends. After the first case is completed, the larva starts moving around, pulling its case behind. With each molt, the larva enlarges its case. Later cases are flattened and widest in the middle, allowing the larva to turn around inside.”

What's That Bug? does not endorse extermination

Subject: Wierd bug
Location: Minnesota
November 16, 2015 10:57 am
Looked like a crumpled up tissue then it moved and a head came out like a turtle in a shell
Signature: Na

Case Making Clothes Moth Larva

Case Making Clothes Moth Larva

Dear Na,
This looks like a Case Making Clothes Moth Larva to us, and though you did not indicate if it was found among wool or silk clothes, the image on fabric supports that it may have been found in a closet.  See BugGuide for more images and information including that they:  “Feed on wool, feathers, fur, hair, upholstered furniture, leather, fish meals, milk powders, lint, dust or paper. Often infesting carpets, especially in damp areas.”

What's That Bug? does not endorse extermination

Subject: Weird worm creature
Location: Singapore
January 17, 2015 9:47 am
Hi there… I hope you can help identify this creature in my bathroom… It’s only seen in my bathroom. It freaks me out. Please help identify this.
About 1.5cm long. Has a leaf shaped soft shell it can crawl out from both ends.
Signature: Sandra from Singapore

Case Bearing Moth Larva

Case Bearing Moth Larva

Dear Sandra,
The Case Bearing Moth Larva or Household Casebearer,
Phereoeca fallax, is a common household pest that is found in many parts of the world.  You individual has a very distinctly marked case.  According to BugGuide:  “The larval case is silk-lined inside and open at both ends. The case is constructed by the earliest larval stage (1st instar) before it hatches, and is enlarged by each successive instar. In constructing the case, the larva secretes silk to build an arch attached at both ends to the substrate. Very small particles of sand, soil, iron rust, insect droppings, arthropod remains, hairs and other fibers are added on the outside. The inside of the arch is lined exclusively by silk, and is gradually extended to form a tunnel, while the larva stays inside. The tunnel is closed beneath by the larva to form a tube free from the substrate, and open at both ends. After the first case is completed, the larva starts moving around, pulling its case behind. With each molt, the larva enlarges its case. Later cases are flattened and widest in the middle, allowing the larva to turn around inside.”  The bold black and white spiral pattern on your individual’s case is likely due to fibers that were incorporated in the making of the case.

What's That Bug? does not endorse extermination

Subject: Never seen anything like it.

Location: Victoria, Australia
December 9, 2014 3:19 pm
I have no idea what this bug is. I’m pretty sure they’re falling out of my roof through the fan in my bathroom.
It doesn’t necessarily look like a bug but they do move.
It’s about as long as a thumb nail and looks like a dirty bit of roof insulation.
Signature: TC

Case Bearing Moth Larva, we presume

Case Bearing Moth Larva, we presume

Dear TC,
We can’t imagine that this is anything other than a Case Bearing Moth Larva, though it looks different from individuals we are used to seeing, perhaps because it is using distinctly Australian building materials.

What's That Bug? does not endorse extermination

November 13, 2014

Dear Mr. Marlos:
I found the attached, tiny cocoon-like item in my sink (of all places) the other day. When i pressed on it, out came the pictured worm. I don’t know whether to be sorry that I interrupted its chrysalis sleep or not. I suppose it depends on whether it was destined to be a beautiful butterfly or a garden pest. Can you help me to (hopefully) alleviate my guilt?
Mark Kulkis

Case Bearing Moth Larva

Case Bearing Moth Larva

Dear Mr. Kulkis,
How nice to hear from you.  This is a Case Bearing Moth Larva and it is a common household intruder.  We have one amazing image in our archives of a pack of Case Bearing Moth Larvae eating a dog biscuit.

What's That Bug? does not endorse extermination