Not much was happening at this nest and only the chicks were visible and they were intrigued as to what that visitor was doing (not much, just taking photos). Mum didn't realise but must have caught on because the chicks looked engaged and curious about something. She had peek out the box, saw me and flew out the door outraged - or was it guilty? After all she got caught not paying attention. And then she looked almost sheepish - gosh they are so funny!