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.
My guess is a carpenter bee, and there is a hole somewhere you didn't notice
Or a very shitty carpenter gone rogue
Wait, are bees able to spec into rogue?
Depends on which ruleset you follow
D&Bee 3.5
Seconded
Could also be carpenter ants, no?
My guess is it could be The Carpenters. Look for any signs of a Californian soft rock band.
Possibly carpenter pants, look for big side pockets and denim loops.
Well, bless your Carhartt
I'm a Dickies Man, tyvm.
Rainy days and mondays, am I right
When I was young, I listened to the radio, waiting for my favorite song.
Carpenter ants tend to create little pellets in my experience.
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.