Haven't ran Blue Samson in 2 weeks, it's spring in Dixie, so no telling what you'll find. Went to the woodyard yesterday evening, uncovered Blue Samson and found this on the back side of the pusher plate... Probably a house wren, luckily no eggs present yet, so got evicted.
Those wrens sure like to buld their nests back in little hidey-holes. Glad you found it before it was permanently occupied.