new nest

After having cleansed the birdflat and did some repair,
I gave it an easy to open up door, with a real hook-lock.
so I do not have every time remove the box from its place and unscrew the box to open.


To my surprise, immediately after hanging the box again on place,
the next day a new nest was build!
First days no bird to be seen, but yes! same blackbird decided to have another family.
This time he was very creative. making a big leave hanging in front of the opening of the box, like a curtain before the entrance.
or would it be to hide the opening?