Avian pox infection, aspergillosis and renal trematodiasis in a Royal tern

Poxvirus infection and aspergillosis were diagnosed in a Royal tern (Thalasseus maximus) based on gross and microscopic lesions. This represents the first known report of avian pox in a tern. Renal trematodiasis, caused by a species of Renicola also is described.