u/Alternative-South677

For the past week, each night something is bringing mud, sticks, leaves and moss onto the edge of a 1x4 in my parents garage. My dad knocked it all down with a broom a few days ago, but whatever it is has brought even more back over the past few nights. There is no trail on the ground like termites would make, I didn’t find any type of nest in the garage itself, it has me puzzled.