I thought at first it was just a huge piece of dust, but looking closer, I realized the dust looks more like hairs.
I am currently fixing up an abandoned house that the windows are all boarded and there is no air conditioner. I just found this on one of the window frames on the metal.
I do have a problem with a lot of bag worms all over the outside and inside of my house. I thought it could be a cocoon of a moth.
And if it is does it have anything to do with the bag worms?