Well, the 4 blues fledged either late yesterday evening or early this morning. I took some mealworms out for the evening feeding and did not see either the parents or any of the young. It was raining and the wind was blowing so I decided to see if they were still around – but found the nest box empty. The were feeding yesterday during the day but I never say any of the 4 come out of the nest. I will clean the nestbox tomorrow -after this much needed rain, and see if they return for a third sitting.