Hello.
About ten years ago I put up a bird box with a camera in. This year is the first time any bird has built a nest. But on 21/04 I noticed a nest and the following day an egg. By the 28/04 there were 8 eggs and the female Blue tit was sitting on them. The first egg hatched on 05/05 followed by 5 more ( six in total) The adults fed the chicks and sat on them . Then on the 13/05 they stopped sitting on them at night ( is this normal? ) but continued to feed them during the day. Then this morning (16/05) when I looked all six were dead . the temperature did drop to 7*C last night. All very sad really.
Ian