The bluetit is back at Box1.
As usual, if there is no other bird around, he will go down onto the nest box hole to have a closer look.
I don't believe it - he's actually going in!
This isn't quite a first, but it's most unusual!
What's he up to now? He seems to be examining the floor of the box. Still, there is not much else to do in there is there!
He jumps up to the nest box hole to have a look out and stays there for a while.
Leaving. He was inside for less than a minute!
It is some time (about 50 minutes) before the great tit returns.