I removed a section of baseboard and found some unusual little blackish-brownish clumps on the back of it and the drywall that it was fastened to:
Anyone have any idea what these might be?
For context, this baseboard came off of an interior wall in a dark coat closet. There is some old termite damage nearby (they ate the paper off some drywall) but no tubes or current activity. Maybe it's mold caused by the old water damage that attracted the termites?