Hi people, looking for help please...Over the past 2-3 weeks we have had a pair of blue tits building a nest in our bird box which contains a camera in our garden. While they have been building it the female has been roosting in there at night. However for the last 4-5 nights she hasn't been roosting in there but we guessed that was because the nest building had finished and ready for eggs to be laid. The pair were seen during the daytime the following 2 days afterwards but haven't been seen at all over the last 2 days since then. The nest is definitely finished but there are no eggs in it.. do they have a gap between nest building and egg laying or have they abandoned the nest but why? Any help would be much appreciated thanks. :-(