| avian myeloblastosis-associated virus | species | viruses and viroids | viruses | species | 11960 |
| avian myeloblastosis-associated virus type 1 | no rank | viruses and viroids | viruses | no rank | 31669 |
| avian myeloblastosis-associated virus type 2 | no rank | viruses and viroids | viruses | no rank | 31670 |
| avian myelocytomatosis virus | species | viruses and viroids | viruses | species | 11867 |
| avian retrovirus | species | viruses and viroids | viruses | species | 11955 |
| avian sarcoma virus | species | viruses and viroids | viruses | species | 11876 |
| avian sarcoma virus 1 | no rank | viruses and viroids | viruses | no rank | 11957 |
| avian sarcoma virus 16 | no rank | viruses and viroids | viruses | no rank | 60629 |
| avian sarcoma virus 31 | no rank | viruses and viroids | viruses | no rank | 35270 |