In mammals, females are more likely to stay in their natal groups while males are usually the sex that disperses. Birds show the reverse pattern, with males being more likely to stay in their natal areas and females disperse. These patterns, known as sex-biased dispersal, serve a useful biological purpose. If one sex disperses farther than the other, it's less likely that siblings or other close relatives will meet as breeding adults and try to mate. This reduces inbreeding and it's genetic consequences. The patterns I've been seeing with the house wrens might be a reflection of this wider behavioral tendency.
First female caught this season at territory A7. She was actually born at Lux Arbor in 2012 in a different portion of the study site. She appears to have paired with the male at A7 and sings in response to simulated intruders, despite the fact they haven't started a nest yet.