Today we have had a visit to Box3 from a pair of great tits. I'm not quite sure whether this is the male or the female.
I think this is probably the female with the male sussing things out inside.
Ten seconds later he is still there.
"What's it like then?"
A minute later he leaves like a cork out of a bottle! You can see him pushing himself off with his feet still on the box!
Both the other two boxes had visitors today too.
This looks like a female. At least it is fairly easy to tell the sexes apart with this pair!