Woodrat Monkey-business ?

So, several months ago, Walt Koenig vacated the carriage house at the School House. There were a few aluminum cans in the recycling box, and a few scattered things in the workshop. Eric Walters went in to check a few things and found this odd pattern. Some animals had moved the crushed aluminum cans into a pattern of a square around the edge of the room. Maybe this is some kind of wood rat fun? We set up a camera with an infra-red illuminator and we hope to catch the little guys in action. The region of brown down the middle of the garage floor is bat droppings- this old garage is a favorite winter roost for a colony of bats. Each year Walt gathered up the guano and use the spreader to put it on the lawn.