Phillyblues, I had the same pair the last 2 years. I know this b/c they were old hands at nesting–I recognized how efficiently they did each task. They were amazing. AND when I would want to check the box, I would whistle softly, and Mama would pop right out of the box. She definitely knew my whistle. This year, though, I have that new pair and it’s been crazy. They are not comfy around me yet. The TRES, on the other hand, I suspect are the same ones. They respond to me like always, and this year (so far) they’ve been kinder to my husband. Things could change when those eggs hatch, though!