On Saturday, I was sat in the garden with my parents, when one of these baby wrens fell out of its nest and landed on the floor. It was too small to have flown the nest deliberately so we figured that it must have fallen out by accident.
My dad rushed to the rescue, picked it up and tried to put it back in the nest. Obviously it would have been a bit of a task to actually get it back in the hole with so many other little heads sticking out – hence why it is just sat on the edge of the box.
We then had to put up a 'safety net' in case it fell out again.