On Sunday, 23rd May 2010, Dirk Heinrich, Ursula Bader, Holger Kolberg, Mark Boorman and I went out to Monte Christo, about 30 km outside Windhoek, to do some birding and bird-ringing. In the evening, close to 17h00, as the cold set in and the birds started moving to their roosting places, Dirk caught a couple of African Reed-Warblers Acrocephalus baeticatus in a net close to some reeds. The first bird was ringed and released and it flew in the direction of the reeds where it had been caught. The second bird had a very unusual moult. The three outside primary feathers on each wing were only partly grown and Dirk gave the moult as being 5555555222 for both wings. The wing length was 57 mm. The bird was ringed with metal ring No AP69761. When the bird was released it was immediately obvious that it had some difficulty flying. Instead of flying down towards the reeds it flew in an ever lower semi-circle landing in the cold water of the main pond at Monte Christo about 10 m from the water's edge.