But what's all this? Kelly seems to be taking it out again ... !
... and brings some back in again. She really can't make up her mind, can she?!
More moss being removed ...
... and more being brought inside again.
Still, you're fixed up with a mate and you've found your nest site, but it's much too early to lay your eggs - bluetits feed their young on caterpillars that feed on the early oak tree leaves and these are weeks away - so what else is there to do?
And nest building is very therapeutic!!
The pair thinking of nesting in Box1 appear to have different ways of passing the time - but they are still busy around the nest, presumably to make sure that no other birds think of taking it.