This is a follow-up to my previous question "Is there a way to determine if cold spots on a thermal image are due to water?"
I cut a small hole in the cold spot in question. The first thing I noticed was a blast of air. This is an external wall, and there are no HVAC ducts nearby - the HVAC was not running anyway. i.e. I assume there is an opening somewhere allowing air and moisture from the outside in.
The area itself had insulation - the backing paper is there, but it seems like much of the fiberglass was chewed up and carried off.
I uploaded an album to imgur with the complete set of pictures I took. I will upload some particular ones here.
There are a number of dead stink bugs, spider webs, and various mouse droppings.
Can you help me understand what the heck these things are in the wall?
Update: I got annoyed enough to cut out a square of drywall:
Notice the bottom left corner - how that "wood like" material is torn up (I did not do that), and there's a tan thing behind it (blue arrow pointing to it)? That's the back of the aluminum siding!