Another visiting female at GSB this morning, I believe. It's unbanded, larger than Newman (who has been in the nest box most of the time) and has some peachy-rusty feathers on face and breast. They are talking, not challenging. Haven't seen Lisa 53-W today. Just before noon, Newman left the box, she followed, he caught a bird for her. Together on the large feeding ledge, then she returned with a piece to the box camera housing.