La langue sifflée
Mouk and Chavapa are in Africa, with their friend Bouba. Today, they plan to see and record the songs of the birds, but nothing happens as planned: the observation post is ruined. Even though they can hear the whistles, they can't see any birds. Worse, when they return, Chavapa's bicycle has disappeared! What has happened? Who took the bike and how will they be able to continue their world tour?