Spouse had a potential sighting (downstairs), so I went to the default location (the pantry).
There's a problem with having secured all standard mouse-food (like birdseed) in difficult-to-get-through containers.
There's a problem with buying flour in 25 pound bags when one doesn't have a sufficiency of Large Pickle Jars into which to transfer it as soon as it comes home.
It broke my frugal little heart, but I just threw away probably between 7 and 10 pounds of all-purpose flour, due to the fact that the bag had been opened from the bottom, and not by me.
The only saving grace to that is that the previously unopened 25 pound bag of bread flour seems to be intact.
Gotta go buy more pickles...
And start checking the trap twice a day... again.