No, no idea where they are getting over or through.... it's some place they can't find again, though, that's for sure!
I am beginning to think they MIGHT be getting on top of the two "stored" cars parked right next to the fence (by my landlady - it IS her property) under a tree. I've seen them up on those cars every once in a while. I wonder if they are then jumping to the tree??? and then going into the vacant lot from there??
Silly birds. First Rebecca, then Samantha (my first GrandChick), and then then Daughter2. All of 'em EEs. Hmmmmmmm.