Mama wren made a nest in the church bird house last year and again this year. A pesky squirrel keeps chewing the doorway bigger and bigger. So between the wren's nesting and raising her first family, something HAD to be done!
DH's innovative idea to limit the entrance space was to attach a part of an old credit card. Quite a natural mountain scene. She must like the view from her front porch. She keeps coming back. Her reservations are always accepted and her credit is good. We're leaving the light on for her.