In 1999, research was published where scientists described the identification of an evolutionary distinct new avian hepadnavirus. Snow geese (Anser caerulescens) in Canada appeared infected with a virus that was closely related to Duck Hepatitis B Virus.
This research again shows the versatility of the virus. Ever more species are found to harbour a variant of the Hepatitis virus.
 Chang et al: A new avian hepadnavirus infecting snow geese (Anser caerulescens) produces a significant fraction of virions containing single-stranded DNA in Virology - 1999