The birdhouse has found a nice place in the garden where the neighbors' cats cannot get to it and where there is a little peace and quiet from us humans. At first very little happened and it quickly became apparent that the entrance hole was too small at 2.8 cm in diameter. So I enlarged it to 3.2 cm and since then the interest in the new home has increased significantly.
At first there was little movement at the house, but we were already happy to see the first beak, which could be seen from inside the entrance hole. When a tit was seen in the house at the end of the first week, the anticipation grew.