this post was submitted on 24 Jul 2025
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What is this thing?

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It looks like it came from some form of pest, but there are no obvious holes or material above it. It's between glass and a screen with no obvious openings or holes. None of my other windows have it. We did have the house re-insulated recently, but I don't think it looked like this. Any help identifying what's going on?

I'm geographically located in Northern NJ I'm the US in the suburbs.

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[–] PlaidBaron@lemmy.world 22 points 2 days ago (1 children)

This the pollen of the sawdust tree! Quercus alunima. It thrives in moderate, humid climates. It releases pollen that, when aggregated, looks like piles of sawdust. This used to confuse early settlers when they first colonized America. The puritans used to call it 'the devil's sawdust' since it appeared out of nowhere like magic. But the tree is perhaps most famous for not actually existing because I just made all that up.

[–] gibmiser@lemmy.world 62 points 3 days ago (4 children)

My guess is a carpenter bee, and there is a hole somewhere you didn't notice

[–] neidu3@sh.itjust.works 23 points 3 days ago* (last edited 3 days ago) (1 children)

Or a very shitty carpenter gone rogue

[–] Mac@mander.xyz 11 points 3 days ago (1 children)

Wait, are bees able to spec into rogue?

[–] actionjbone@sh.itjust.works 5 points 3 days ago (1 children)

Depends on which ruleset you follow

[–] neidu3@sh.itjust.works 4 points 3 days ago
[–] crank0271@lemmy.world 10 points 3 days ago (2 children)

Could also be carpenter ants, no?

[–] massive_bereavement@fedia.io 40 points 3 days ago (3 children)

My guess is it could be The Carpenters. Look for any signs of a Californian soft rock band.

[–] Nougat@fedia.io 9 points 3 days ago (1 children)

Possibly carpenter pants, look for big side pockets and denim loops.

[–] gws@programming.dev 4 points 3 days ago (1 children)
[–] Nougat@fedia.io 1 points 2 days ago

I'm a Dickies Man, tyvm.

[–] thesohoriots@lemmy.world 6 points 3 days ago

Rainy days and mondays, am I right

[–] pastermil@sh.itjust.works 4 points 3 days ago

When I was young, I listened to the radio, waiting for my favorite song.

[–] JohnnyCanuck@lemmy.ca 4 points 3 days ago

Carpenter ants tend to create little pellets in my experience.

[–] tal@lemmy.today 7 points 3 days ago* (last edited 3 days ago)

https://whatsinmyyard.wordpress.com/2015/06/13/a-home-for-bees-part-2/

Does look like the shavings are similar to this image of shavings from a carpenter bee, to my layman's eye.

[–] Linktank@lemmy.today 11 points 3 days ago

Maybe the hole is under the pile?

[–] AA5B@lemmy.world 3 points 2 days ago* (last edited 2 days ago)

Maybe carpenter ants. At one point I discovered them by a pile of sawdust like that on my coffee table.

It turned out there was enough of a roof leak to cause some rot despite no visible leak symptoms, the ants were following that, and happened to discard the sawdust out a tiny hole in the ceiling above my coffee table. It sucked because that was the signal to replace the roof

[–] kertain@sh.itjust.works 3 points 3 days ago (1 children)

I have has that with fireants and the foam in alot of windows and doors. Is it foam bits perhaps?

[–] loopedcandle@lemmynsfw.com 1 points 3 days ago

It does look like foam to me.

[–] Hello_there@fedia.io 2 points 3 days ago (1 children)
[–] tal@lemmy.today 2 points 2 days ago

It doesn't look much like termite droppings to me:

https://www.orkin.com/pests/termites/termite-droppings

What Do Termite Pellets Look Like?

Drywood termite pellets are tiny, oval-shaped capsules with six concave sides and rounded ends. These pellets, which are about 1 millimeter in length, can form small mounds beneath kick out holes. The mounds may look like small piles of salt or pepper.

termite-droppings

[–] jerkface@lemmy.ca 1 points 3 days ago

Is there a tree outside the window