A free flight to the breeding wall is an important prerequisite for successful breeding. In order to prevent the shrub encroachment at the walls, robinia saplings and strong buddleia shoots are removed. Last year‘s breeding tubes are documented on the basis of remaining pellet residues and scratch marks at the entrance holes of the tubes. Finally, an observation tent is set up which will allow us to observe and film some of the breeding pairs at close range without disturbing them. And the wait for the return of our summer birds begins!