The presented paper describes the diagnostic possibilities of the combined radiographic and ultrasonographic examination of abdominal diseases in birds. Radiographs give an overview of the skeleton system, but even with additional contrast studies of the gastro-intestinal tract it is often difficult to detect the origin or inner structure of soft tissue densities. Ultrasonography can be used to obtain information on the parenchymal texture of organs and to detect abdominal fluids. The combination of both imaging techniques is a suitable diagnostic and prognostic tool in avian medicine. The advantages and disadvantages of both examination techniques and their combination are demonstrated. In two cases additional computed tomographies were performed.