Already since two years one of our members of the Birdringingstation 'Schlammwiss' is working together with
Christian Stange at Kaiserstuhl / Freiburg. During the autumn and winter the main work is the maintenance of the biotopes. For spring they start to control the nest
boxes of little owls (Athene noctua) and hoopoes (Upua epopos) and to ring the juveniles.