Knowledgebase

Possible bagworms #842770

Asked July 26, 2023, 5:23 PM EDT

Hi everyone, Hope all is well at HGIC. I found these on a silver maple trunk across the street from me. Was wondering if they are bagworms. This has been a stange growing season for sure! Thanks, Debbie

Howard County Maryland

Expert Response

Hi Debbie!

One of our coordinators recently brought in a sample of these as well, on the bark of her Fringetree. They do appear to be a type of Bagworm, but we're not certain exactly which species. An entomologist at NC State has photographed something similar consuming lichen on bark, and other species in that same moth family (like this one) have been tentatively IDed in discussions on BugGuide, though neither that I looked up seem to be in Maryland Biodiversity Project's database.

Miri

Hi Miri,

Thanks. These were very close to the bagworms. Don't think they are related but curious about them too.

The Question Asker Replied July 27, 2023, 2:53 PM EDT
Interesting! We will consult with an entomologist and see if we can come up with a tentative ID for those larvae. Might you be able to get a clearer photo, by chance?

Miri

Here is another attempt. They are located in the crook of a limb. So it's tricky to get a better photo. Thanks so much for your help with this.

The Question Asker Replied July 28, 2023, 9:21 AM EDT

Hello,

Thank you for your question and photos!

The cases attached to the silver maple tree bark do appear to be some kind of bagworm casing. Bagworms use all different kinds of plant materials to create their casings. A very cool find! 

The additional larvae you found appear to be some kind of beetle larvae, potentially larvae of one of the twice-stabbed lady beetle species (typically predators of scale insects) or some other lady beetle (belonging to the beetle family Coccinellidae). Another very cool find! You can see many of the larvae have entered into the pupal stage- seen by the split larval body with the pupae inside. 

A good sign to see these beneficial insects (lady beetles) in the landscape. 


Great, I will keep an eye out on the larva to see if I can see what hatches out.

As always, you are great and I'm still proud that I used to be one of the ranks!!!

The Question Asker Replied July 28, 2023, 12:04 PM EDT

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