The three owlets have now, pretty much, lost their down feathers and look like adults, which means the nest box is quite crowded when everyone is home.
They now spend most of their time in the loft outside the box, as they increase their flying lessons, but return to the nest box to feed.
As they become more proficient at flying they will venture further and look for a home of their own and we will have an empty nest until, hopefully, the adults return.
Regards
WBOT