Hi folks, this is my first post in BF. I am hoping someone may be able to offer some advice or insight. I put up a bird box last autumn and was lucky enough to have a pair of blue tits inspecting it from January onwards. I’m not sure when nest building began or ended but I heard low level cheeping coming from the nest box on May 4th which made me think at least one egg had hatched. For the next three weeks both parents were coming back and forth constantly with insects and caterpillars very attentively. About 10 days ago (approx 31st May) the nest box became very noisy, lots of loud cheeping from what sounded like many babies, and the parents continued to come back and forth. About 7 days ago the male bird left and hasn’t returned. I’ve not seen any fledging happening and there’s no sign in the garden of any juvenile blue tits having been on the ground or attacked and I’ve been watching the nest box like a hawk! I have of course totally stayed away as per the advice for wild birds. However for the last 7 days the noise from the nest box has been limited to one bird only and it cheeps all day. Just one voice constantly cheeping. The female bird is still coming and going with food but this timeline seems awfully long for there to be any babies left in the nest box. Is it that the remaining bird could be trapped? Mum is still attentive but as mentioned she is alone and there are no fledglings following her whenever I see her. Which makes me wonder where are the other babies if no longer in the nest box. The male bird up until a week ago had been incredibly attentive, could he be somewhere looking after the fledglings? Is it normal for there still to be one left in there this late in the timeline? I thought they’d have all fledged by now and latest about end of May. Thanks in advance!