This case report presents the course of a chronic disease of a female bald eagle (Haliaeetus leucocephalus) that lived in "Der Wilde Berg Mautern", a wildlife park in Styria, Austria. The bird was clinically healthy until it showed initial signs of disease in 2011. The symptoms recurred every spring until 2013, when the bird was euthanized because of a severely worsened general condition. Every spring, starting when the bird was 14 years old, severe alterations were found on the skin in the neck and beak area. Macroscopically the lesions started from approximately pinhead-sized raised dark nodules and grew to pea -sized nodes. The lesions disappeared at the start of the following winter. At first the changes were linked to moult but later they were thought to result from the dry form of avian pox with a secondary bacterial infection. This suspicion was finally confirmed by histopathological examination, when Bollinger bodies were found, after euthanasia of the bird in 2013.