[viruses]
   Realm Riboviria
     Phylum Negarnaviricota
       Subphylum Haploviricotina
         Class Monjiviricetes
           Order Mononegavirales
             Family Paramyxoviridae
               Subfamily Avulavirinae
                 Genus Paraavulavirus
                   Avian paraavulavirus 4