This and the next pair of images show pictures of the bluetit that were taken at the same time by the two cameras.
It looks as though the bluetit is displaying at its own image which it can see in the glass.
I hope it (or its partner) gets used to it when there is work to be done!
This bluetit still seems to think that he can get hold of this box as a nest site. Does he know something that we don't know?