Help identify this insect debris

[Inco]

Can you identify this insect debris in a window? The last photo shows damage to the window frame above.

Edited May 12, 2021 by Inco

[Jim Katen]

That's spider debris. The small separation at the top of the window shouldn't be related to insects. Is the window flashed on the outside? 

[Inco]

There's also something on the inside on the crank. It's been cleared away but keeps coming back. 

The house was built in 1988. These are Anderson windows. I have no reason to believe there wouldn't be flashing. 

 

[Jim Katen]

22 hours ago, Inco said:

There's also something on the inside on the crank. It's been cleared away but keeps coming back. 

Looks like general dust & debris sifting out from the gap between the window frame and the window casing. 

22 hours ago, Inco said:

These are Anderson windows. I have no reason to believe there wouldn't be flashing. 

Seriously? It's just as easy to omit flashing on an Anderson window as it is on any other window.